#include // https://blog.csdn.net/qq_41923622/article/details/79756107 using namespace std; int a[10][10]; int bj[3][20]= {0}; int bj1[3][20]= {0}; int n; int sum=0; void f2(int x ) { int y; if(x==n)sum++; else { for(y=0; y