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大牛们帮我看看这段代码,很短,老师WA#include <cstdio> #include <algorithm> #include <functional> #include<cstdlib> #include<iostream> #include<cstring> using namespace std; char a[8][8]; bool can[8]; int n,k; long c; void dfs(int i,int num) { for(int j=0;j<n;j++) { if(a[i][j]=='#'&&can[j]==true) { can[j]=false; num--; if(i+1<n&&num>0) dfs(i+1,num); else if(num==0) c++; num++; can[j]=true; } } } int main() { while(scanf("%d%d",&n,&k)!=EOF) { if(n==-1&&k==-1) break; for(int i=0;i<8;i++) can[i]=true; for(int i=0;i<n;i++) for(int j=0;j<n;j++) cin>>a[i][j]; c=0; for(int i=0;i<n;i++) dfs(i,k); cout<<c<<endl; } system("pause"); return 0; } Followed by:
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