作者在 2008-07-09 12:16:41 发布以下内容
引用
C++里新增加了引用的概念。引用的最大优点就是不占用更多的内存，这样也省去了传参时的复制值的操作。尤其是对数组形式的参数，或者迭代函数来说具有价值。
使用数组的引用，必须知道数组的大小。例如：void f(char (&list)[10]);
如果不知道数组的长度，那么只有使用指针引用。指针引用是一个可行的方法。不过，必须是按照下面的方式来使用：
void F(int* &a,int &n);
int main()
{
......
int* a;
......
a=new int[10];//or int c[10]={0};a=c;
......
F(a,10);
......
}
或许，你会想：省略一个指针的传参的操作有意义吗？可以参看下面的这道题：
链接里的题目中的函数，是一个递归的函数。每次传参都会传递指针参数，其实这些操作是可以省略的。如果把：void F(const T E[],int n,int x=0,int y=0)，修改成：void F(const T* &E,const int &n,const int &x,int &y)。这样子，就能最大限度的减少空间的开销了。
下面是修改后的版本。
程序：
#include <iostream>
using namespace std;
int* list;
template<class T>
void Print(const T* &E,const int &x)
{
cout<<"{";
for(int i=0;i<x-1;i++)
{
cout<<E[list[i]]<<", ";
}
cout<<E[list[x-1]]<<"} ";
}
template<class T>
void F(const T* &E,const int &n,const int &x,int &y)
{
//本函数用来求出集合E中x个元素的所有子集
if(x==0)
{
//0元素子集
cout<<"{}";
return;
}
if(x==n)
{
//全元素子集
cout<<"{";
for(int j=0;j<n-1;j++)
{
cout<<E[j]<<", ";
}
cout<<E[n-1]<<"}";
return;
}
if(x>y)
{
//第一次取数
if(y==0)
{
for(int k=0;k<n-x+1;k++)
{
list[y]=k;
if(y==x-1)
{
Print(E,x);
}
else
{
y++;
F(E,n,x,y);
y--;
}
}
return;
}
//取1个元素
for(int i=list[y-1]+1;i<n-x+y+1;i++)
{
list[y]=i;
if(y==x-1)
{
Print(E,x);
}
else
{
y++;
F(E,n,x,y);
y--;
}
}
list[y]=0;
}
}
template<class T>
void eXF(const T* &E,const int &n)
{
list=new int[n];
for(int i=0;i<=n;i++)
{
//分别求出0到n个元素的子集
int y=0;
F(E,n,i,y);
cout<<endl;
}
delete [] list;
list=0;
}
int main()
{
char* a=new char[10];
a[0]='a';
a[1]='b';
a[2]='c';
a[3]='d';
a[4]='e';
a[5]='f';
a[6]='g';
a[7]='h';
a[8]='i';
a[9]='j';
try
{
eXF(a,10);
}
catch(const char *s)
{
cout<<s<<endl;
return 1;
}
delete [] a;
a=0;
cout<<endl<<endl;
int* b=new int[5];
b[0]=1;
b[1]=2;
b[2]=3;
b[3]=4;
b[4]=5;
try
{
eXF(b,5);
}
catch(const char *s)
{
cout<<s<<endl;
return 1;
}
return 0;
}
using namespace std;
int* list;
template<class T>
void Print(const T* &E,const int &x)
{
cout<<"{";
for(int i=0;i<x-1;i++)
{
cout<<E[list[i]]<<", ";
}
cout<<E[list[x-1]]<<"} ";
}
template<class T>
void F(const T* &E,const int &n,const int &x,int &y)
{
//本函数用来求出集合E中x个元素的所有子集
if(x==0)
{
//0元素子集
cout<<"{}";
return;
}
if(x==n)
{
//全元素子集
cout<<"{";
for(int j=0;j<n-1;j++)
{
cout<<E[j]<<", ";
}
cout<<E[n-1]<<"}";
return;
}
if(x>y)
{
//第一次取数
if(y==0)
{
for(int k=0;k<n-x+1;k++)
{
list[y]=k;
if(y==x-1)
{
Print(E,x);
}
else
{
y++;
F(E,n,x,y);
y--;
}
}
return;
}
//取1个元素
for(int i=list[y-1]+1;i<n-x+y+1;i++)
{
list[y]=i;
if(y==x-1)
{
Print(E,x);
}
else
{
y++;
F(E,n,x,y);
y--;
}
}
list[y]=0;
}
}
template<class T>
void eXF(const T* &E,const int &n)
{
list=new int[n];
for(int i=0;i<=n;i++)
{
//分别求出0到n个元素的子集
int y=0;
F(E,n,i,y);
cout<<endl;
}
delete [] list;
list=0;
}
int main()
{
char* a=new char[10];
a[0]='a';
a[1]='b';
a[2]='c';
a[3]='d';
a[4]='e';
a[5]='f';
a[6]='g';
a[7]='h';
a[8]='i';
a[9]='j';
try
{
eXF(a,10);
}
catch(const char *s)
{
cout<<s<<endl;
return 1;
}
delete [] a;
a=0;
cout<<endl<<endl;
int* b=new int[5];
b[0]=1;
b[1]=2;
b[2]=3;
b[3]=4;
b[4]=5;
try
{
eXF(b,5);
}
catch(const char *s)
{
cout<<s<<endl;
return 1;
}
return 0;
}
结果：
{}
{a} {b} {c} {d} {e} {f} {g} {h} {i} {j}
{a, b} {a, c} {a, d} {a, e} {a, f} {a, g} {a, h} {a, i} {a, j} {b, c} {b, d} {b,
e} {b, f} {b, g} {b, h} {b, i} {b, j} {c, d} {c, e} {c, f} {c, g} {c, h} {c, i}
{c, j} {d, e} {d, f} {d, g} {d, h} {d, i} {d, j} {e, f} {e, g} {e, h} {e, i} {e
, j} {f, g} {f, h} {f, i} {f, j} {g, h} {g, i} {g, j} {h, i} {h, j} {i, j}
{a, b, c} {a, b, d} {a, b, e} {a, b, f} {a, b, g} {a, b, h} {a, b, i} {a, b, j}
{a, c, d} {a, c, e} {a, c, f} {a, c, g} {a, c, h} {a, c, i} {a, c, j} {a, d, e}
{a, d, f} {a, d, g} {a, d, h} {a, d, i} {a, d, j} {a, e, f} {a, e, g} {a, e, h}
{a, e, i} {a, e, j} {a, f, g} {a, f, h} {a, f, i} {a, f, j} {a, g, h} {a, g, i}
{a, g, j} {a, h, i} {a, h, j} {a, i, j} {b, c, d} {b, c, e} {b, c, f} {b, c, g}
{b, c, h} {b, c, i} {b, c, j} {b, d, e} {b, d, f} {b, d, g} {b, d, h} {b, d, i}
{b, d, j} {b, e, f} {b, e, g} {b, e, h} {b, e, i} {b, e, j} {b, f, g} {b, f, h}
{b, f, i} {b, f, j} {b, g, h} {b, g, i} {b, g, j} {b, h, i} {b, h, j} {b, i, j}
{c, d, e} {c, d, f} {c, d, g} {c, d, h} {c, d, i} {c, d, j} {c, e, f} {c, e, g}
{c, e, h} {c, e, i} {c, e, j} {c, f, g} {c, f, h} {c, f, i} {c, f, j} {c, g, h}
{c, g, i} {c, g, j} {c, h, i} {c, h, j} {c, i, j} {d, e, f} {d, e, g} {d, e, h}
{d, e, i} {d, e, j} {d, f, g} {d, f, h} {d, f, i} {d, f, j} {d, g, h} {d, g, i}
{d, g, j} {d, h, i} {d, h, j} {d, i, j} {e, f, g} {e, f, h} {e, f, i} {e, f, j}
{e, g, h} {e, g, i} {e, g, j} {e, h, i} {e, h, j} {e, i, j} {f, g, h} {f, g, i}
{f, g, j} {f, h, i} {f, h, j} {f, i, j} {g, h, i} {g, h, j} {g, i, j} {h, i, j}
{a} {b} {c} {d} {e} {f} {g} {h} {i} {j}
{a, b} {a, c} {a, d} {a, e} {a, f} {a, g} {a, h} {a, i} {a, j} {b, c} {b, d} {b,
e} {b, f} {b, g} {b, h} {b, i} {b, j} {c, d} {c, e} {c, f} {c, g} {c, h} {c, i}
{c, j} {d, e} {d, f} {d, g} {d, h} {d, i} {d, j} {e, f} {e, g} {e, h} {e, i} {e
, j} {f, g} {f, h} {f, i} {f, j} {g, h} {g, i} {g, j} {h, i} {h, j} {i, j}
{a, b, c} {a, b, d} {a, b, e} {a, b, f} {a, b, g} {a, b, h} {a, b, i} {a, b, j}
{a, c, d} {a, c, e} {a, c, f} {a, c, g} {a, c, h} {a, c, i} {a, c, j} {a, d, e}
{a, d, f} {a, d, g} {a, d, h} {a, d, i} {a, d, j} {a, e, f} {a, e, g} {a, e, h}
{a, e, i} {a, e, j} {a, f, g} {a, f, h} {a, f, i} {a, f, j} {a, g, h} {a, g, i}
{a, g, j} {a, h, i} {a, h, j} {a, i, j} {b, c, d} {b, c, e} {b, c, f} {b, c, g}
{b, c, h} {b, c, i} {b, c, j} {b, d, e} {b, d, f} {b, d, g} {b, d, h} {b, d, i}
{b, d, j} {b, e, f} {b, e, g} {b, e, h} {b, e, i} {b, e, j} {b, f, g} {b, f, h}
{b, f, i} {b, f, j} {b, g, h} {b, g, i} {b, g, j} {b, h, i} {b, h, j} {b, i, j}
{c, d, e} {c, d, f} {c, d, g} {c, d, h} {c, d, i} {c, d, j} {c, e, f} {c, e, g}
{c, e, h} {c, e, i} {c, e, j} {c, f, g} {c, f, h} {c, f, i} {c, f, j} {c, g, h}
{c, g, i} {c, g, j} {c, h, i} {c, h, j} {c, i, j} {d, e, f} {d, e, g} {d, e, h}
{d, e, i} {d, e, j} {d, f, g} {d, f, h} {d, f, i} {d, f, j} {d, g, h} {d, g, i}
{d, g, j} {d, h, i} {d, h, j} {d, i, j} {e, f, g} {e, f, h} {e, f, i} {e, f, j}
{e, g, h} {e, g, i} {e, g, j} {e, h, i} {e, h, j} {e, i, j} {f, g, h} {f, g, i}
{f, g, j} {f, h, i} {f, h, j} {f, i, j} {g, h, i} {g, h, j} {g, i, j} {h, i, j}
{a, b, c, d} {a, b, c, e} {a, b, c, f} {a, b, c, g} {a, b, c, h} {a, b, c, i} {a
, b, c, j} {a, b, d, e} {a, b, d, f} {a, b, d, g} {a, b, d, h} {a, b, d, i} {a,
b, d, j} {a, b, e, f} {a, b, e, g} {a, b, e, h} {a, b, e, i} {a, b, e, j} {a, b,
f, g} {a, b, f, h} {a, b, f, i} {a, b, f, j} {a, b, g, h} {a, b, g, i} {a, b, g
, j} {a, b, h, i} {a, b, h, j} {a, b, i, j} {a, c, d, e} {a, c, d, f} {a, c, d,
g} {a, c, d, h} {a, c, d, i} {a, c, d, j} {a, c, e, f} {a, c, e, g} {a, c, e, h}
{a, c, e, i} {a, c, e, j} {a, c, f, g} {a, c, f, h} {a, c, f, i} {a, c, f, j} {
a, c, g, h} {a, c, g, i} {a, c, g, j} {a, c, h, i} {a, c, h, j} {a, c, i, j} {a,
d, e, f} {a, d, e, g} {a, d, e, h} {a, d, e, i} {a, d, e, j} {a, d, f, g} {a, d
, f, h} {a, d, f, i} {a, d, f, j} {a, d, g, h} {a, d, g, i} {a, d, g, j} {a, d,
h, i} {a, d, h, j} {a, d, i, j} {a, e, f, g} {a, e, f, h} {a, e, f, i} {a, e, f,
j} {a, e, g, h} {a, e, g, i} {a, e, g, j} {a, e, h, i} {a, e, h, j} {a, e, i, j
} {a, f, g, h} {a, f, g, i} {a, f, g, j} {a, f, h, i} {a, f, h, j} {a, f, i, j}
{a, g, h, i} {a, g, h, j} {a, g, i, j} {a, h, i, j} {b, c, d, e} {b, c, d, f} {b
, c, d, g} {b, c, d, h} {b, c, d, i} {b, c, d, j} {b, c, e, f} {b, c, e, g} {b,
c, e, h} {b, c, e, i} {b, c, e, j} {b, c, f, g} {b, c, f, h} {b, c, f, i} {b, c,
f, j} {b, c, g, h} {b, c, g, i} {b, c, g, j} {b, c, h, i} {b, c, h, j} {b, c, i
, j} {b, d, e, f} {b, d, e, g} {b, d, e, h} {b, d, e, i} {b, d, e, j} {b, d, f,
g} {b, d, f, h} {b, d, f, i} {b, d, f, j} {b, d, g, h} {b, d, g, i} {b, d, g, j}
{b, d, h, i} {b, d, h, j} {b, d, i, j} {b, e, f, g} {b, e, f, h} {b, e, f, i} {
b, e, f, j} {b, e, g, h} {b, e, g, i} {b, e, g, j} {b, e, h, i} {b, e, h, j} {b,
e, i, j} {b, f, g, h} {b, f, g, i} {b, f, g, j} {b, f, h, i} {b, f, h, j} {b, f
, i, j} {b, g, h, i} {b, g, h, j} {b, g, i, j} {b, h, i, j} {c, d, e, f} {c, d,
e, g} {c, d, e, h} {c, d, e, i} {c, d, e, j} {c, d, f, g} {c, d, f, h} {c, d, f,
i} {c, d, f, j} {c, d, g, h} {c, d, g, i} {c, d, g, j} {c, d, h, i} {c, d, h, j
} {c, d, i, j} {c, e, f, g} {c, e, f, h} {c, e, f, i} {c, e, f, j} {c, e, g, h}
{c, e, g, i} {c, e, g, j} {c, e, h, i} {c, e, h, j} {c, e, i, j} {c, f, g, h} {c
, f, g, i} {c, f, g, j} {c, f, h, i} {c, f, h, j} {c, f, i, j} {c, g, h, i} {c,
g, h, j} {c, g, i, j} {c, h, i, j} {d, e, f, g} {d, e, f, h} {d, e, f, i} {d, e,
f, j} {d, e, g, h} {d, e, g, i} {d, e, g, j} {d, e, h, i} {d, e, h, j} {d, e, i
, j} {d, f, g, h} {d, f, g, i} {d, f, g, j} {d, f, h, i} {d, f, h, j} {d, f, i,
j} {d, g, h, i} {d, g, h, j} {d, g, i, j} {d, h, i, j} {e, f, g, h} {e, f, g, i}
{e, f, g, j} {e, f, h, i} {e, f, h, j} {e, f, i, j} {e, g, h, i} {e, g, h, j} {
e, g, i, j} {e, h, i, j} {f, g, h, i} {f, g, h, j} {f, g, i, j} {f, h, i, j} {g,
h, i, j}
{a, b, c, d, e} {a, b, c, d, f} {a, b, c, d, g} {a, b, c, d, h} {a, b, c, d, i}
{a, b, c, d, j} {a, b, c, e, f} {a, b, c, e, g} {a, b, c, e, h} {a, b, c, e, i}
{a, b, c, e, j} {a, b, c, f, g} {a, b, c, f, h} {a, b, c, f, i} {a, b, c, f, j}
{a, b, c, g, h} {a, b, c, g, i} {a, b, c, g, j} {a, b, c, h, i} {a, b, c, h, j}
{a, b, c, i, j} {a, b, d, e, f} {a, b, d, e, g} {a, b, d, e, h} {a, b, d, e, i}
{a, b, d, e, j} {a, b, d, f, g} {a, b, d, f, h} {a, b, d, f, i} {a, b, d, f, j}
{a, b, d, g, h} {a, b, d, g, i} {a, b, d, g, j} {a, b, d, h, i} {a, b, d, h, j}
{a, b, d, i, j} {a, b, e, f, g} {a, b, e, f, h} {a, b, e, f, i} {a, b, e, f, j}
{a, b, e, g, h} {a, b, e, g, i} {a, b, e, g, j} {a, b, e, h, i} {a, b, e, h, j}
{a, b, e, i, j} {a, b, f, g, h} {a, b, f, g, i} {a, b, f, g, j} {a, b, f, h, i}
{a, b, f, h, j} {a, b, f, i, j} {a, b, g, h, i} {a, b, g, h, j} {a, b, g, i, j}
{a, b, h, i, j} {a, c, d, e, f} {a, c, d, e, g} {a, c, d, e, h} {a, c, d, e, i}
{a, c, d, e, j} {a, c, d, f, g} {a, c, d, f, h} {a, c, d, f, i} {a, c, d, f, j}
{a, c, d, g, h} {a, c, d, g, i} {a, c, d, g, j} {a, c, d, h, i} {a, c, d, h, j}
{a, c, d, i, j} {a, c, e, f, g} {a, c, e, f, h} {a, c, e, f, i} {a, c, e, f, j}
{a, c, e, g, h} {a, c, e, g, i} {a, c, e, g, j} {a, c, e, h, i} {a, c, e, h, j}
{a, c, e, i, j} {a, c, f, g, h} {a, c, f, g, i} {a, c, f, g, j} {a, c, f, h, i}
{a, c, f, h, j} {a, c, f, i, j} {a, c, g, h, i} {a, c, g, h, j} {a, c, g, i, j}
{a, c, h, i, j} {a, d, e, f, g} {a, d, e, f, h} {a, d, e, f, i} {a, d, e, f, j}
{a, d, e, g, h} {a, d, e, g, i} {a, d, e, g, j} {a, d, e, h, i} {a, d, e, h, j}
{a, d, e, i, j} {a, d, f, g, h} {a, d, f, g, i} {a, d, f, g, j} {a, d, f, h, i}
{a, d, f, h, j} {a, d, f, i, j} {a, d, g, h, i} {a, d, g, h, j} {a, d, g, i, j}
{a, d, h, i, j} {a, e, f, g, h} {a, e, f, g, i} {a, e, f, g, j} {a, e, f, h, i}
{a, e, f, h, j} {a, e, f, i, j} {a, e, g, h, i} {a, e, g, h, j} {a, e, g, i, j}
{a, e, h, i, j} {a, f, g, h, i} {a, f, g, h, j} {a, f, g, i, j} {a, f, h, i, j}
{a, g, h, i, j} {b, c, d, e, f} {b, c, d, e, g} {b, c, d, e, h} {b, c, d, e, i}
{b, c, d, e, j} {b, c, d, f, g} {b, c, d, f, h} {b, c, d, f, i} {b, c, d, f, j}
{b, c, d, g, h} {b, c, d, g, i} {b, c, d, g, j} {b, c, d, h, i} {b, c, d, h, j}
{b, c, d, i, j} {b, c, e, f, g} {b, c, e, f, h} {b, c, e, f, i} {b, c, e, f, j}
{b, c, e, g, h} {b, c, e, g, i} {b, c, e, g, j} {b, c, e, h, i} {b, c, e, h, j}
{b, c, e, i, j} {b, c, f, g, h} {b, c, f, g, i} {b, c, f, g, j} {b, c, f, h, i}
{b, c, f, h, j} {b, c, f, i, j} {b, c, g, h, i} {b, c, g, h, j} {b, c, g, i, j}
{b, c, h, i, j} {b, d, e, f, g} {b, d, e, f, h} {b, d, e, f, i} {b, d, e, f, j}
{b, d, e, g, h} {b, d, e, g, i} {b, d, e, g, j} {b, d, e, h, i} {b, d, e, h, j}
{b, d, e, i, j} {b, d, f, g, h} {b, d, f, g, i} {b, d, f, g, j} {b, d, f, h, i}
{b, d, f, h, j} {b, d, f, i, j} {b, d, g, h, i} {b, d, g, h, j} {b, d, g, i, j}
{b, d, h, i, j} {b, e, f, g, h} {b, e, f, g, i} {b, e, f, g, j} {b, e, f, h, i}
{b, e, f, h, j} {b, e, f, i, j} {b, e, g, h, i} {b, e, g, h, j} {b, e, g, i, j}
{b, e, h, i, j} {b, f, g, h, i} {b, f, g, h, j} {b, f, g, i, j} {b, f, h, i, j}
{b, g, h, i, j} {c, d, e, f, g} {c, d, e, f, h} {c, d, e, f, i} {c, d, e, f, j}
{c, d, e, g, h} {c, d, e, g, i} {c, d, e, g, j} {c, d, e, h, i} {c, d, e, h, j}
{c, d, e, i, j} {c, d, f, g, h} {c, d, f, g, i} {c, d, f, g, j} {c, d, f, h, i}
{c, d, f, h, j} {c, d, f, i, j} {c, d, g, h, i} {c, d, g, h, j} {c, d, g, i, j}
{c, d, h, i, j} {c, e, f, g, h} {c, e, f, g, i} {c, e, f, g, j} {c, e, f, h, i}
{c, e, f, h, j} {c, e, f, i, j} {c, e, g, h, i} {c, e, g, h, j} {c, e, g, i, j}
{c, e, h, i, j} {c, f, g, h, i} {c, f, g, h, j} {c, f, g, i, j} {c, f, h, i, j}
{c, g, h, i, j} {d, e, f, g, h} {d, e, f, g, i} {d, e, f, g, j} {d, e, f, h, i}
{d, e, f, h, j} {d, e, f, i, j} {d, e, g, h, i} {d, e, g, h, j} {d, e, g, i, j}
{d, e, h, i, j} {d, f, g, h, i} {d, f, g, h, j} {d, f, g, i, j} {d, f, h, i, j}
{d, g, h, i, j} {e, f, g, h, i} {e, f, g, h, j} {e, f, g, i, j} {e, f, h, i, j}
{e, g, h, i, j} {f, g, h, i, j}
{a, b, c, d, e, f} {a, b, c, d, e, g} {a, b, c, d, e, h} {a, b, c, d, e, i} {a,
b, c, d, e, j} {a, b, c, d, f, g} {a, b, c, d, f, h} {a, b, c, d, f, i} {a, b, c
, d, f, j} {a, b, c, d, g, h} {a, b, c, d, g, i} {a, b, c, d, g, j} {a, b, c, d,
h, i} {a, b, c, d, h, j} {a, b, c, d, i, j} {a, b, c, e, f, g} {a, b, c, e, f,
h} {a, b, c, e, f, i} {a, b, c, e, f, j} {a, b, c, e, g, h} {a, b, c, e, g, i} {
a, b, c, e, g, j} {a, b, c, e, h, i} {a, b, c, e, h, j} {a, b, c, e, i, j} {a, b
, c, f, g, h} {a, b, c, f, g, i} {a, b, c, f, g, j} {a, b, c, f, h, i} {a, b, c,
f, h, j} {a, b, c, f, i, j} {a, b, c, g, h, i} {a, b, c, g, h, j} {a, b, c, g,
i, j} {a, b, c, h, i, j} {a, b, d, e, f, g} {a, b, d, e, f, h} {a, b, d, e, f, i
} {a, b, d, e, f, j} {a, b, d, e, g, h} {a, b, d, e, g, i} {a, b, d, e, g, j} {a
, b, d, e, h, i} {a, b, d, e, h, j} {a, b, d, e, i, j} {a, b, d, f, g, h} {a, b,
d, f, g, i} {a, b, d, f, g, j} {a, b, d, f, h, i} {a, b, d, f, h, j} {a, b, d,
f, i, j} {a, b, d, g, h, i} {a, b, d, g, h, j} {a, b, d, g, i, j} {a, b, d, h, i
, j} {a, b, e, f, g, h} {a, b, e, f, g, i} {a, b, e, f, g, j} {a, b, e, f, h, i}
{a, b, e, f, h, j} {a, b, e, f, i, j} {a, b, e, g, h, i} {a, b, e, g, h, j} {a,
b, e, g, i, j} {a, b, e, h, i, j} {a, b, f, g, h, i} {a, b, f, g, h, j} {a, b,
f, g, i, j} {a, b, f, h, i, j} {a, b, g, h, i, j} {a, c, d, e, f, g} {a, c, d, e
, f, h} {a, c, d, e, f, i} {a, c, d, e, f, j} {a, c, d, e, g, h} {a, c, d, e, g,
i} {a, c, d, e, g, j} {a, c, d, e, h, i} {a, c, d, e, h, j} {a, c, d, e, i, j}
{a, c, d, f, g, h} {a, c, d, f, g, i} {a, c, d, f, g, j} {a, c, d, f, h, i} {a,
c, d, f, h, j} {a, c, d, f, i, j} {a, c, d, g, h, i} {a, c, d, g, h, j} {a, c, d
, g, i, j} {a, c, d, h, i, j} {a, c, e, f, g, h} {a, c, e, f, g, i} {a, c, e, f,
g, j} {a, c, e, f, h, i} {a, c, e, f, h, j} {a, c, e, f, i, j} {a, c, e, g, h,
i} {a, c, e, g, h, j} {a, c, e, g, i, j} {a, c, e, h, i, j} {a, c, f, g, h, i} {
a, c, f, g, h, j} {a, c, f, g, i, j} {a, c, f, h, i, j} {a, c, g, h, i, j} {a, d
, e, f, g, h} {a, d, e, f, g, i} {a, d, e, f, g, j} {a, d, e, f, h, i} {a, d, e,
f, h, j} {a, d, e, f, i, j} {a, d, e, g, h, i} {a, d, e, g, h, j} {a, d, e, g,
i, j} {a, d, e, h, i, j} {a, d, f, g, h, i} {a, d, f, g, h, j} {a, d, f, g, i, j
} {a, d, f, h, i, j} {a, d, g, h, i, j} {a, e, f, g, h, i} {a, e, f, g, h, j} {a
, e, f, g, i, j} {a, e, f, h, i, j} {a, e, g, h, i, j} {a, f, g, h, i, j} {b, c,
d, e, f, g} {b, c, d, e, f, h} {b, c, d, e, f, i} {b, c, d, e, f, j} {b, c, d,
e, g, h} {b, c, d, e, g, i} {b, c, d, e, g, j} {b, c, d, e, h, i} {b, c, d, e, h
, j} {b, c, d, e, i, j} {b, c, d, f, g, h} {b, c, d, f, g, i} {b, c, d, f, g, j}
{b, c, d, f, h, i} {b, c, d, f, h, j} {b, c, d, f, i, j} {b, c, d, g, h, i} {b,
c, d, g, h, j} {b, c, d, g, i, j} {b, c, d, h, i, j} {b, c, e, f, g, h} {b, c,
e, f, g, i} {b, c, e, f, g, j} {b, c, e, f, h, i} {b, c, e, f, h, j} {b, c, e, f
, i, j} {b, c, e, g, h, i} {b, c, e, g, h, j} {b, c, e, g, i, j} {b, c, e, h, i,
j} {b, c, f, g, h, i} {b, c, f, g, h, j} {b, c, f, g, i, j} {b, c, f, h, i, j}
{b, c, g, h, i, j} {b, d, e, f, g, h} {b, d, e, f, g, i} {b, d, e, f, g, j} {b,
d, e, f, h, i} {b, d, e, f, h, j} {b, d, e, f, i, j} {b, d, e, g, h, i} {b, d, e
, g, h, j} {b, d, e, g, i, j} {b, d, e, h, i, j} {b, d, f, g, h, i} {b, d, f, g,
h, j} {b, d, f, g, i, j} {b, d, f, h, i, j} {b, d, g, h, i, j} {b, e, f, g, h,
i} {b, e, f, g, h, j} {b, e, f, g, i, j} {b, e, f, h, i, j} {b, e, g, h, i, j} {
b, f, g, h, i, j} {c, d, e, f, g, h} {c, d, e, f, g, i} {c, d, e, f, g, j} {c, d
, e, f, h, i} {c, d, e, f, h, j} {c, d, e, f, i, j} {c, d, e, g, h, i} {c, d, e,
g, h, j} {c, d, e, g, i, j} {c, d, e, h, i, j} {c, d, f, g, h, i} {c, d, f, g,
h, j} {c, d, f, g, i, j} {c, d, f, h, i, j} {c, d, g, h, i, j} {c, e, f, g, h, i
} {c, e, f, g, h, j} {c, e, f, g, i, j} {c, e, f, h, i, j} {c, e, g, h, i, j} {c
, f, g, h, i, j} {d, e, f, g, h, i} {d, e, f, g, h, j} {d, e, f, g, i, j} {d, e,
f, h, i, j} {d, e, g, h, i, j} {d, f, g, h, i, j} {e, f, g, h, i, j}
{a, b, c, d, e, f, g} {a, b, c, d, e, f, h} {a, b, c, d, e, f, i} {a, b, c, d, e
, f, j} {a, b, c, d, e, g, h} {a, b, c, d, e, g, i} {a, b, c, d, e, g, j} {a, b,
c, d, e, h, i} {a, b, c, d, e, h, j} {a, b, c, d, e, i, j} {a, b, c, d, f, g, h
} {a, b, c, d, f, g, i} {a, b, c, d, f, g, j} {a, b, c, d, f, h, i} {a, b, c, d,
f, h, j} {a, b, c, d, f, i, j} {a, b, c, d, g, h, i} {a, b, c, d, g, h, j} {a,
b, c, d, g, i, j} {a, b, c, d, h, i, j} {a, b, c, e, f, g, h} {a, b, c, e, f, g,
i} {a, b, c, e, f, g, j} {a, b, c, e, f, h, i} {a, b, c, e, f, h, j} {a, b, c,
e, f, i, j} {a, b, c, e, g, h, i} {a, b, c, e, g, h, j} {a, b, c, e, g, i, j} {a
, b, c, e, h, i, j} {a, b, c, f, g, h, i} {a, b, c, f, g, h, j} {a, b, c, f, g,
i, j} {a, b, c, f, h, i, j} {a, b, c, g, h, i, j} {a, b, d, e, f, g, h} {a, b, d
, e, f, g, i} {a, b, d, e, f, g, j} {a, b, d, e, f, h, i} {a, b, d, e, f, h, j}
{a, b, d, e, f, i, j} {a, b, d, e, g, h, i} {a, b, d, e, g, h, j} {a, b, d, e, g
, i, j} {a, b, d, e, h, i, j} {a, b, d, f, g, h, i} {a, b, d, f, g, h, j} {a, b,
d, f, g, i, j} {a, b, d, f, h, i, j} {a, b, d, g, h, i, j} {a, b, e, f, g, h, i
} {a, b, e, f, g, h, j} {a, b, e, f, g, i, j} {a, b, e, f, h, i, j} {a, b, e, g,
h, i, j} {a, b, f, g, h, i, j} {a, c, d, e, f, g, h} {a, c, d, e, f, g, i} {a,
c, d, e, f, g, j} {a, c, d, e, f, h, i} {a, c, d, e, f, h, j} {a, c, d, e, f, i,
j} {a, c, d, e, g, h, i} {a, c, d, e, g, h, j} {a, c, d, e, g, i, j} {a, c, d,
e, h, i, j} {a, c, d, f, g, h, i} {a, c, d, f, g, h, j} {a, c, d, f, g, i, j} {a
, c, d, f, h, i, j} {a, c, d, g, h, i, j} {a, c, e, f, g, h, i} {a, c, e, f, g,
h, j} {a, c, e, f, g, i, j} {a, c, e, f, h, i, j} {a, c, e, g, h, i, j} {a, c, f
, g, h, i, j} {a, d, e, f, g, h, i} {a, d, e, f, g, h, j} {a, d, e, f, g, i, j}
{a, d, e, f, h, i, j} {a, d, e, g, h, i, j} {a, d, f, g, h, i, j} {a, e, f, g, h
, i, j} {b, c, d, e, f, g, h} {b, c, d, e, f, g, i} {b, c, d, e, f, g, j} {b, c,
d, e, f, h, i} {b, c, d, e, f, h, j} {b, c, d, e, f, i, j} {b, c, d, e, g, h, i
} {b, c, d, e, g, h, j} {b, c, d, e, g, i, j} {b, c, d, e, h, i, j} {b, c, d, f,
g, h, i} {b, c, d, f, g, h, j} {b, c, d, f, g, i, j} {b, c, d, f, h, i, j} {b,
c, d, g, h, i, j} {b, c, e, f, g, h, i} {b, c, e, f, g, h, j} {b, c, e, f, g, i,
j} {b, c, e, f, h, i, j} {b, c, e, g, h, i, j} {b, c, f, g, h, i, j} {b, d, e,
f, g, h, i} {b, d, e, f, g, h, j} {b, d, e, f, g, i, j} {b, d, e, f, h, i, j} {b
, d, e, g, h, i, j} {b, d, f, g, h, i, j} {b, e, f, g, h, i, j} {c, d, e, f, g,
h, i} {c, d, e, f, g, h, j} {c, d, e, f, g, i, j} {c, d, e, f, h, i, j} {c, d, e
, g, h, i, j} {c, d, f, g, h, i, j} {c, e, f, g, h, i, j} {d, e, f, g, h, i, j}
, b, c, j} {a, b, d, e} {a, b, d, f} {a, b, d, g} {a, b, d, h} {a, b, d, i} {a,
b, d, j} {a, b, e, f} {a, b, e, g} {a, b, e, h} {a, b, e, i} {a, b, e, j} {a, b,
f, g} {a, b, f, h} {a, b, f, i} {a, b, f, j} {a, b, g, h} {a, b, g, i} {a, b, g
, j} {a, b, h, i} {a, b, h, j} {a, b, i, j} {a, c, d, e} {a, c, d, f} {a, c, d,
g} {a, c, d, h} {a, c, d, i} {a, c, d, j} {a, c, e, f} {a, c, e, g} {a, c, e, h}
{a, c, e, i} {a, c, e, j} {a, c, f, g} {a, c, f, h} {a, c, f, i} {a, c, f, j} {
a, c, g, h} {a, c, g, i} {a, c, g, j} {a, c, h, i} {a, c, h, j} {a, c, i, j} {a,
d, e, f} {a, d, e, g} {a, d, e, h} {a, d, e, i} {a, d, e, j} {a, d, f, g} {a, d
, f, h} {a, d, f, i} {a, d, f, j} {a, d, g, h} {a, d, g, i} {a, d, g, j} {a, d,
h, i} {a, d, h, j} {a, d, i, j} {a, e, f, g} {a, e, f, h} {a, e, f, i} {a, e, f,
j} {a, e, g, h} {a, e, g, i} {a, e, g, j} {a, e, h, i} {a, e, h, j} {a, e, i, j
} {a, f, g, h} {a, f, g, i} {a, f, g, j} {a, f, h, i} {a, f, h, j} {a, f, i, j}
{a, g, h, i} {a, g, h, j} {a, g, i, j} {a, h, i, j} {b, c, d, e} {b, c, d, f} {b
, c, d, g} {b, c, d, h} {b, c, d, i} {b, c, d, j} {b, c, e, f} {b, c, e, g} {b,
c, e, h} {b, c, e, i} {b, c, e, j} {b, c, f, g} {b, c, f, h} {b, c, f, i} {b, c,
f, j} {b, c, g, h} {b, c, g, i} {b, c, g, j} {b, c, h, i} {b, c, h, j} {b, c, i
, j} {b, d, e, f} {b, d, e, g} {b, d, e, h} {b, d, e, i} {b, d, e, j} {b, d, f,
g} {b, d, f, h} {b, d, f, i} {b, d, f, j} {b, d, g, h} {b, d, g, i} {b, d, g, j}
{b, d, h, i} {b, d, h, j} {b, d, i, j} {b, e, f, g} {b, e, f, h} {b, e, f, i} {
b, e, f, j} {b, e, g, h} {b, e, g, i} {b, e, g, j} {b, e, h, i} {b, e, h, j} {b,
e, i, j} {b, f, g, h} {b, f, g, i} {b, f, g, j} {b, f, h, i} {b, f, h, j} {b, f
, i, j} {b, g, h, i} {b, g, h, j} {b, g, i, j} {b, h, i, j} {c, d, e, f} {c, d,
e, g} {c, d, e, h} {c, d, e, i} {c, d, e, j} {c, d, f, g} {c, d, f, h} {c, d, f,
i} {c, d, f, j} {c, d, g, h} {c, d, g, i} {c, d, g, j} {c, d, h, i} {c, d, h, j
} {c, d, i, j} {c, e, f, g} {c, e, f, h} {c, e, f, i} {c, e, f, j} {c, e, g, h}
{c, e, g, i} {c, e, g, j} {c, e, h, i} {c, e, h, j} {c, e, i, j} {c, f, g, h} {c
, f, g, i} {c, f, g, j} {c, f, h, i} {c, f, h, j} {c, f, i, j} {c, g, h, i} {c,
g, h, j} {c, g, i, j} {c, h, i, j} {d, e, f, g} {d, e, f, h} {d, e, f, i} {d, e,
f, j} {d, e, g, h} {d, e, g, i} {d, e, g, j} {d, e, h, i} {d, e, h, j} {d, e, i
, j} {d, f, g, h} {d, f, g, i} {d, f, g, j} {d, f, h, i} {d, f, h, j} {d, f, i,
j} {d, g, h, i} {d, g, h, j} {d, g, i, j} {d, h, i, j} {e, f, g, h} {e, f, g, i}
{e, f, g, j} {e, f, h, i} {e, f, h, j} {e, f, i, j} {e, g, h, i} {e, g, h, j} {
e, g, i, j} {e, h, i, j} {f, g, h, i} {f, g, h, j} {f, g, i, j} {f, h, i, j} {g,
h, i, j}
{a, b, c, d, e} {a, b, c, d, f} {a, b, c, d, g} {a, b, c, d, h} {a, b, c, d, i}
{a, b, c, d, j} {a, b, c, e, f} {a, b, c, e, g} {a, b, c, e, h} {a, b, c, e, i}
{a, b, c, e, j} {a, b, c, f, g} {a, b, c, f, h} {a, b, c, f, i} {a, b, c, f, j}
{a, b, c, g, h} {a, b, c, g, i} {a, b, c, g, j} {a, b, c, h, i} {a, b, c, h, j}
{a, b, c, i, j} {a, b, d, e, f} {a, b, d, e, g} {a, b, d, e, h} {a, b, d, e, i}
{a, b, d, e, j} {a, b, d, f, g} {a, b, d, f, h} {a, b, d, f, i} {a, b, d, f, j}
{a, b, d, g, h} {a, b, d, g, i} {a, b, d, g, j} {a, b, d, h, i} {a, b, d, h, j}
{a, b, d, i, j} {a, b, e, f, g} {a, b, e, f, h} {a, b, e, f, i} {a, b, e, f, j}
{a, b, e, g, h} {a, b, e, g, i} {a, b, e, g, j} {a, b, e, h, i} {a, b, e, h, j}
{a, b, e, i, j} {a, b, f, g, h} {a, b, f, g, i} {a, b, f, g, j} {a, b, f, h, i}
{a, b, f, h, j} {a, b, f, i, j} {a, b, g, h, i} {a, b, g, h, j} {a, b, g, i, j}
{a, b, h, i, j} {a, c, d, e, f} {a, c, d, e, g} {a, c, d, e, h} {a, c, d, e, i}
{a, c, d, e, j} {a, c, d, f, g} {a, c, d, f, h} {a, c, d, f, i} {a, c, d, f, j}
{a, c, d, g, h} {a, c, d, g, i} {a, c, d, g, j} {a, c, d, h, i} {a, c, d, h, j}
{a, c, d, i, j} {a, c, e, f, g} {a, c, e, f, h} {a, c, e, f, i} {a, c, e, f, j}
{a, c, e, g, h} {a, c, e, g, i} {a, c, e, g, j} {a, c, e, h, i} {a, c, e, h, j}
{a, c, e, i, j} {a, c, f, g, h} {a, c, f, g, i} {a, c, f, g, j} {a, c, f, h, i}
{a, c, f, h, j} {a, c, f, i, j} {a, c, g, h, i} {a, c, g, h, j} {a, c, g, i, j}
{a, c, h, i, j} {a, d, e, f, g} {a, d, e, f, h} {a, d, e, f, i} {a, d, e, f, j}
{a, d, e, g, h} {a, d, e, g, i} {a, d, e, g, j} {a, d, e, h, i} {a, d, e, h, j}
{a, d, e, i, j} {a, d, f, g, h} {a, d, f, g, i} {a, d, f, g, j} {a, d, f, h, i}
{a, d, f, h, j} {a, d, f, i, j} {a, d, g, h, i} {a, d, g, h, j} {a, d, g, i, j}
{a, d, h, i, j} {a, e, f, g, h} {a, e, f, g, i} {a, e, f, g, j} {a, e, f, h, i}
{a, e, f, h, j} {a, e, f, i, j} {a, e, g, h, i} {a, e, g, h, j} {a, e, g, i, j}
{a, e, h, i, j} {a, f, g, h, i} {a, f, g, h, j} {a, f, g, i, j} {a, f, h, i, j}
{a, g, h, i, j} {b, c, d, e, f} {b, c, d, e, g} {b, c, d, e, h} {b, c, d, e, i}
{b, c, d, e, j} {b, c, d, f, g} {b, c, d, f, h} {b, c, d, f, i} {b, c, d, f, j}
{b, c, d, g, h} {b, c, d, g, i} {b, c, d, g, j} {b, c, d, h, i} {b, c, d, h, j}
{b, c, d, i, j} {b, c, e, f, g} {b, c, e, f, h} {b, c, e, f, i} {b, c, e, f, j}
{b, c, e, g, h} {b, c, e, g, i} {b, c, e, g, j} {b, c, e, h, i} {b, c, e, h, j}
{b, c, e, i, j} {b, c, f, g, h} {b, c, f, g, i} {b, c, f, g, j} {b, c, f, h, i}
{b, c, f, h, j} {b, c, f, i, j} {b, c, g, h, i} {b, c, g, h, j} {b, c, g, i, j}
{b, c, h, i, j} {b, d, e, f, g} {b, d, e, f, h} {b, d, e, f, i} {b, d, e, f, j}
{b, d, e, g, h} {b, d, e, g, i} {b, d, e, g, j} {b, d, e, h, i} {b, d, e, h, j}
{b, d, e, i, j} {b, d, f, g, h} {b, d, f, g, i} {b, d, f, g, j} {b, d, f, h, i}
{b, d, f, h, j} {b, d, f, i, j} {b, d, g, h, i} {b, d, g, h, j} {b, d, g, i, j}
{b, d, h, i, j} {b, e, f, g, h} {b, e, f, g, i} {b, e, f, g, j} {b, e, f, h, i}
{b, e, f, h, j} {b, e, f, i, j} {b, e, g, h, i} {b, e, g, h, j} {b, e, g, i, j}
{b, e, h, i, j} {b, f, g, h, i} {b, f, g, h, j} {b, f, g, i, j} {b, f, h, i, j}
{b, g, h, i, j} {c, d, e, f, g} {c, d, e, f, h} {c, d, e, f, i} {c, d, e, f, j}
{c, d, e, g, h} {c, d, e, g, i} {c, d, e, g, j} {c, d, e, h, i} {c, d, e, h, j}
{c, d, e, i, j} {c, d, f, g, h} {c, d, f, g, i} {c, d, f, g, j} {c, d, f, h, i}
{c, d, f, h, j} {c, d, f, i, j} {c, d, g, h, i} {c, d, g, h, j} {c, d, g, i, j}
{c, d, h, i, j} {c, e, f, g, h} {c, e, f, g, i} {c, e, f, g, j} {c, e, f, h, i}
{c, e, f, h, j} {c, e, f, i, j} {c, e, g, h, i} {c, e, g, h, j} {c, e, g, i, j}
{c, e, h, i, j} {c, f, g, h, i} {c, f, g, h, j} {c, f, g, i, j} {c, f, h, i, j}
{c, g, h, i, j} {d, e, f, g, h} {d, e, f, g, i} {d, e, f, g, j} {d, e, f, h, i}
{d, e, f, h, j} {d, e, f, i, j} {d, e, g, h, i} {d, e, g, h, j} {d, e, g, i, j}
{d, e, h, i, j} {d, f, g, h, i} {d, f, g, h, j} {d, f, g, i, j} {d, f, h, i, j}
{d, g, h, i, j} {e, f, g, h, i} {e, f, g, h, j} {e, f, g, i, j} {e, f, h, i, j}
{e, g, h, i, j} {f, g, h, i, j}
{a, b, c, d, e, f} {a, b, c, d, e, g} {a, b, c, d, e, h} {a, b, c, d, e, i} {a,
b, c, d, e, j} {a, b, c, d, f, g} {a, b, c, d, f, h} {a, b, c, d, f, i} {a, b, c
, d, f, j} {a, b, c, d, g, h} {a, b, c, d, g, i} {a, b, c, d, g, j} {a, b, c, d,
h, i} {a, b, c, d, h, j} {a, b, c, d, i, j} {a, b, c, e, f, g} {a, b, c, e, f,
h} {a, b, c, e, f, i} {a, b, c, e, f, j} {a, b, c, e, g, h} {a, b, c, e, g, i} {
a, b, c, e, g, j} {a, b, c, e, h, i} {a, b, c, e, h, j} {a, b, c, e, i, j} {a, b
, c, f, g, h} {a, b, c, f, g, i} {a, b, c, f, g, j} {a, b, c, f, h, i} {a, b, c,
f, h, j} {a, b, c, f, i, j} {a, b, c, g, h, i} {a, b, c, g, h, j} {a, b, c, g,
i, j} {a, b, c, h, i, j} {a, b, d, e, f, g} {a, b, d, e, f, h} {a, b, d, e, f, i
} {a, b, d, e, f, j} {a, b, d, e, g, h} {a, b, d, e, g, i} {a, b, d, e, g, j} {a
, b, d, e, h, i} {a, b, d, e, h, j} {a, b, d, e, i, j} {a, b, d, f, g, h} {a, b,
d, f, g, i} {a, b, d, f, g, j} {a, b, d, f, h, i} {a, b, d, f, h, j} {a, b, d,
f, i, j} {a, b, d, g, h, i} {a, b, d, g, h, j} {a, b, d, g, i, j} {a, b, d, h, i
, j} {a, b, e, f, g, h} {a, b, e, f, g, i} {a, b, e, f, g, j} {a, b, e, f, h, i}
{a, b, e, f, h, j} {a, b, e, f, i, j} {a, b, e, g, h, i} {a, b, e, g, h, j} {a,
b, e, g, i, j} {a, b, e, h, i, j} {a, b, f, g, h, i} {a, b, f, g, h, j} {a, b,
f, g, i, j} {a, b, f, h, i, j} {a, b, g, h, i, j} {a, c, d, e, f, g} {a, c, d, e
, f, h} {a, c, d, e, f, i} {a, c, d, e, f, j} {a, c, d, e, g, h} {a, c, d, e, g,
i} {a, c, d, e, g, j} {a, c, d, e, h, i} {a, c, d, e, h, j} {a, c, d, e, i, j}
{a, c, d, f, g, h} {a, c, d, f, g, i} {a, c, d, f, g, j} {a, c, d, f, h, i} {a,
c, d, f, h, j} {a, c, d, f, i, j} {a, c, d, g, h, i} {a, c, d, g, h, j} {a, c, d
, g, i, j} {a, c, d, h, i, j} {a, c, e, f, g, h} {a, c, e, f, g, i} {a, c, e, f,
g, j} {a, c, e, f, h, i} {a, c, e, f, h, j} {a, c, e, f, i, j} {a, c, e, g, h,
i} {a, c, e, g, h, j} {a, c, e, g, i, j} {a, c, e, h, i, j} {a, c, f, g, h, i} {
a, c, f, g, h, j} {a, c, f, g, i, j} {a, c, f, h, i, j} {a, c, g, h, i, j} {a, d
, e, f, g, h} {a, d, e, f, g, i} {a, d, e, f, g, j} {a, d, e, f, h, i} {a, d, e,
f, h, j} {a, d, e, f, i, j} {a, d, e, g, h, i} {a, d, e, g, h, j} {a, d, e, g,
i, j} {a, d, e, h, i, j} {a, d, f, g, h, i} {a, d, f, g, h, j} {a, d, f, g, i, j
} {a, d, f, h, i, j} {a, d, g, h, i, j} {a, e, f, g, h, i} {a, e, f, g, h, j} {a
, e, f, g, i, j} {a, e, f, h, i, j} {a, e, g, h, i, j} {a, f, g, h, i, j} {b, c,
d, e, f, g} {b, c, d, e, f, h} {b, c, d, e, f, i} {b, c, d, e, f, j} {b, c, d,
e, g, h} {b, c, d, e, g, i} {b, c, d, e, g, j} {b, c, d, e, h, i} {b, c, d, e, h
, j} {b, c, d, e, i, j} {b, c, d, f, g, h} {b, c, d, f, g, i} {b, c, d, f, g, j}
{b, c, d, f, h, i} {b, c, d, f, h, j} {b, c, d, f, i, j} {b, c, d, g, h, i} {b,
c, d, g, h, j} {b, c, d, g, i, j} {b, c, d, h, i, j} {b, c, e, f, g, h} {b, c,
e, f, g, i} {b, c, e, f, g, j} {b, c, e, f, h, i} {b, c, e, f, h, j} {b, c, e, f
, i, j} {b, c, e, g, h, i} {b, c, e, g, h, j} {b, c, e, g, i, j} {b, c, e, h, i,
j} {b, c, f, g, h, i} {b, c, f, g, h, j} {b, c, f, g, i, j} {b, c, f, h, i, j}
{b, c, g, h, i, j} {b, d, e, f, g, h} {b, d, e, f, g, i} {b, d, e, f, g, j} {b,
d, e, f, h, i} {b, d, e, f, h, j} {b, d, e, f, i, j} {b, d, e, g, h, i} {b, d, e
, g, h, j} {b, d, e, g, i, j} {b, d, e, h, i, j} {b, d, f, g, h, i} {b, d, f, g,
h, j} {b, d, f, g, i, j} {b, d, f, h, i, j} {b, d, g, h, i, j} {b, e, f, g, h,
i} {b, e, f, g, h, j} {b, e, f, g, i, j} {b, e, f, h, i, j} {b, e, g, h, i, j} {
b, f, g, h, i, j} {c, d, e, f, g, h} {c, d, e, f, g, i} {c, d, e, f, g, j} {c, d
, e, f, h, i} {c, d, e, f, h, j} {c, d, e, f, i, j} {c, d, e, g, h, i} {c, d, e,
g, h, j} {c, d, e, g, i, j} {c, d, e, h, i, j} {c, d, f, g, h, i} {c, d, f, g,
h, j} {c, d, f, g, i, j} {c, d, f, h, i, j} {c, d, g, h, i, j} {c, e, f, g, h, i
} {c, e, f, g, h, j} {c, e, f, g, i, j} {c, e, f, h, i, j} {c, e, g, h, i, j} {c
, f, g, h, i, j} {d, e, f, g, h, i} {d, e, f, g, h, j} {d, e, f, g, i, j} {d, e,
f, h, i, j} {d, e, g, h, i, j} {d, f, g, h, i, j} {e, f, g, h, i, j}
{a, b, c, d, e, f, g} {a, b, c, d, e, f, h} {a, b, c, d, e, f, i} {a, b, c, d, e
, f, j} {a, b, c, d, e, g, h} {a, b, c, d, e, g, i} {a, b, c, d, e, g, j} {a, b,
c, d, e, h, i} {a, b, c, d, e, h, j} {a, b, c, d, e, i, j} {a, b, c, d, f, g, h
} {a, b, c, d, f, g, i} {a, b, c, d, f, g, j} {a, b, c, d, f, h, i} {a, b, c, d,
f, h, j} {a, b, c, d, f, i, j} {a, b, c, d, g, h, i} {a, b, c, d, g, h, j} {a,
b, c, d, g, i, j} {a, b, c, d, h, i, j} {a, b, c, e, f, g, h} {a, b, c, e, f, g,
i} {a, b, c, e, f, g, j} {a, b, c, e, f, h, i} {a, b, c, e, f, h, j} {a, b, c,
e, f, i, j} {a, b, c, e, g, h, i} {a, b, c, e, g, h, j} {a, b, c, e, g, i, j} {a
, b, c, e, h, i, j} {a, b, c, f, g, h, i} {a, b, c, f, g, h, j} {a, b, c, f, g,
i, j} {a, b, c, f, h, i, j} {a, b, c, g, h, i, j} {a, b, d, e, f, g, h} {a, b, d
, e, f, g, i} {a, b, d, e, f, g, j} {a, b, d, e, f, h, i} {a, b, d, e, f, h, j}
{a, b, d, e, f, i, j} {a, b, d, e, g, h, i} {a, b, d, e, g, h, j} {a, b, d, e, g
, i, j} {a, b, d, e, h, i, j} {a, b, d, f, g, h, i} {a, b, d, f, g, h, j} {a, b,
d, f, g, i, j} {a, b, d, f, h, i, j} {a, b, d, g, h, i, j} {a, b, e, f, g, h, i
} {a, b, e, f, g, h, j} {a, b, e, f, g, i, j} {a, b, e, f, h, i, j} {a, b, e, g,
h, i, j} {a, b, f, g, h, i, j} {a, c, d, e, f, g, h} {a, c, d, e, f, g, i} {a,
c, d, e, f, g, j} {a, c, d, e, f, h, i} {a, c, d, e, f, h, j} {a, c, d, e, f, i,
j} {a, c, d, e, g, h, i} {a, c, d, e, g, h, j} {a, c, d, e, g, i, j} {a, c, d,
e, h, i, j} {a, c, d, f, g, h, i} {a, c, d, f, g, h, j} {a, c, d, f, g, i, j} {a
, c, d, f, h, i, j} {a, c, d, g, h, i, j} {a, c, e, f, g, h, i} {a, c, e, f, g,
h, j} {a, c, e, f, g, i, j} {a, c, e, f, h, i, j} {a, c, e, g, h, i, j} {a, c, f
, g, h, i, j} {a, d, e, f, g, h, i} {a, d, e, f, g, h, j} {a, d, e, f, g, i, j}
{a, d, e, f, h, i, j} {a, d, e, g, h, i, j} {a, d, f, g, h, i, j} {a, e, f, g, h
, i, j} {b, c, d, e, f, g, h} {b, c, d, e, f, g, i} {b, c, d, e, f, g, j} {b, c,
d, e, f, h, i} {b, c, d, e, f, h, j} {b, c, d, e, f, i, j} {b, c, d, e, g, h, i
} {b, c, d, e, g, h, j} {b, c, d, e, g, i, j} {b, c, d, e, h, i, j} {b, c, d, f,
g, h, i} {b, c, d, f, g, h, j} {b, c, d, f, g, i, j} {b, c, d, f, h, i, j} {b,
c, d, g, h, i, j} {b, c, e, f, g, h, i} {b, c, e, f, g, h, j} {b, c, e, f, g, i,
j} {b, c, e, f, h, i, j} {b, c, e, g, h, i, j} {b, c, f, g, h, i, j} {b, d, e,
f, g, h, i} {b, d, e, f, g, h, j} {b, d, e, f, g, i, j} {b, d, e, f, h, i, j} {b
, d, e, g, h, i, j} {b, d, f, g, h, i, j} {b, e, f, g, h, i, j} {c, d, e, f, g,
h, i} {c, d, e, f, g, h, j} {c, d, e, f, g, i, j} {c, d, e, f, h, i, j} {c, d, e
, g, h, i, j} {c, d, f, g, h, i, j} {c, e, f, g, h, i, j} {d, e, f, g, h, i, j}
{a, b, c, d, e, f, g, h} {a, b, c, d, e, f, g, i} {a, b, c, d, e, f, g, j} {a, b
, c, d, e, f, h, i} {a, b, c, d, e, f, h, j} {a, b, c, d, e, f, i, j} {a, b, c,
d, e, g, h, i} {a, b, c, d, e, g, h, j} {a, b, c, d, e, g, i, j} {a, b, c, d, e,
h, i, j} {a, b, c, d, f, g, h, i} {a, b, c, d, f, g, h, j} {a, b, c, d, f, g, i
, j} {a, b, c, d, f, h, i, j} {a, b, c, d, g, h, i, j} {a, b, c, e, f, g, h, i}
{a, b, c, e, f, g, h, j} {a, b, c, e, f, g, i, j} {a, b, c, e, f, h, i, j} {a, b
, c, e, g, h, i, j} {a, b, c, f, g, h, i, j} {a, b, d, e, f, g, h, i} {a, b, d,
e, f, g, h, j} {a, b, d, e, f, g, i, j} {a, b, d, e, f, h, i, j} {a, b, d, e, g,
h, i, j} {a, b, d, f, g, h, i, j} {a, b, e, f, g, h, i, j} {a, c, d, e, f, g, h
, i} {a, c, d, e, f, g, h, j} {a, c, d, e, f, g, i, j} {a, c, d, e, f, h, i, j}
{a, c, d, e, g, h, i, j} {a, c, d, f, g, h, i, j} {a, c, e, f, g, h, i, j} {a, d
, e, f, g, h, i, j} {b, c, d, e, f, g, h, i} {b, c, d, e, f, g, h, j} {b, c, d,
e, f, g, i, j} {b, c, d, e, f, h, i, j} {b, c, d, e, g, h, i, j} {b, c, d, f, g,
h, i, j} {b, c, e, f, g, h, i, j} {b, d, e, f, g, h, i, j} {c, d, e, f, g, h, i
, j}
{a, b, c, d, e, f, g, h, i} {a, b, c, d, e, f, g, h, j} {a, b, c, d, e, f, g, i,
j} {a, b, c, d, e, f, h, i, j} {a, b, c, d, e, g, h, i, j} {a, b, c, d, f, g, h
, i, j} {a, b, c, e, f, g, h, i, j} {a, b, d, e, f, g, h, i, j} {a, c, d, e, f,
g, h, i, j} {b, c, d, e, f, g, h, i, j}
{a, b, c, d, e, f, g, h, i, j}
, c, d, e, f, h, i} {a, b, c, d, e, f, h, j} {a, b, c, d, e, f, i, j} {a, b, c,
d, e, g, h, i} {a, b, c, d, e, g, h, j} {a, b, c, d, e, g, i, j} {a, b, c, d, e,
h, i, j} {a, b, c, d, f, g, h, i} {a, b, c, d, f, g, h, j} {a, b, c, d, f, g, i
, j} {a, b, c, d, f, h, i, j} {a, b, c, d, g, h, i, j} {a, b, c, e, f, g, h, i}
{a, b, c, e, f, g, h, j} {a, b, c, e, f, g, i, j} {a, b, c, e, f, h, i, j} {a, b
, c, e, g, h, i, j} {a, b, c, f, g, h, i, j} {a, b, d, e, f, g, h, i} {a, b, d,
e, f, g, h, j} {a, b, d, e, f, g, i, j} {a, b, d, e, f, h, i, j} {a, b, d, e, g,
h, i, j} {a, b, d, f, g, h, i, j} {a, b, e, f, g, h, i, j} {a, c, d, e, f, g, h
, i} {a, c, d, e, f, g, h, j} {a, c, d, e, f, g, i, j} {a, c, d, e, f, h, i, j}
{a, c, d, e, g, h, i, j} {a, c, d, f, g, h, i, j} {a, c, e, f, g, h, i, j} {a, d
, e, f, g, h, i, j} {b, c, d, e, f, g, h, i} {b, c, d, e, f, g, h, j} {b, c, d,
e, f, g, i, j} {b, c, d, e, f, h, i, j} {b, c, d, e, g, h, i, j} {b, c, d, f, g,
h, i, j} {b, c, e, f, g, h, i, j} {b, d, e, f, g, h, i, j} {c, d, e, f, g, h, i
, j}
{a, b, c, d, e, f, g, h, i} {a, b, c, d, e, f, g, h, j} {a, b, c, d, e, f, g, i,
j} {a, b, c, d, e, f, h, i, j} {a, b, c, d, e, g, h, i, j} {a, b, c, d, f, g, h
, i, j} {a, b, c, e, f, g, h, i, j} {a, b, d, e, f, g, h, i, j} {a, c, d, e, f,
g, h, i, j} {b, c, d, e, f, g, h, i, j}
{a, b, c, d, e, f, g, h, i, j}
{}
{1} {2} {3} {4} {5}
{1, 2} {1, 3} {1, 4} {1, 5} {2, 3} {2, 4} {2, 5} {3, 4} {3, 5} {4, 5}
{1, 2, 3} {1, 2, 4} {1, 2, 5} {1, 3, 4} {1, 3, 5} {1, 4, 5} {2, 3, 4} {2, 3, 5}
{2, 4, 5} {3, 4, 5}
{1, 2, 3, 4} {1, 2, 3, 5} {1, 2, 4, 5} {1, 3, 4, 5} {2, 3, 4, 5}
{1, 2, 3, 4, 5}
Press any key to continue
当然，你可以使用以下的代码：
char c[10]={'a','b','c','d','e','f','g','h','i','j'};
char* a=c;
char* a=c;
替代：
char* a=new char[10];
a[0]='a';
a[1]='b';
a[2]='c';
a[3]='d';
a[4]='e';
a[5]='f';
a[6]='g';
a[7]='h';
a[8]='i';
a[9]='j';
a[0]='a';
a[1]='b';
a[2]='c';
a[3]='d';
a[4]='e';
a[5]='f';
a[6]='g';
a[7]='h';
a[8]='i';
a[9]='j';
不过需要注意的是，要消除以下这一行：
delete [] a;
因为，不是用new创建的空间，是不能用delete来回收的。