#include<iostream>#include<cstdio>using namespace std;char a[21][21];bool b[26]; int X[4]={0,1,0,-1}, Y[4]={1,0,-1,0}; int m=0;int R,C; void DFS(int r
posted on 2021-02-05 17:07  独眼  阅读(96)  评论(0编辑  收藏  举报