摘要：
# include <stdio.h># include <string.h> # define REP(i,a,b) for(i = a ; i<= b ; i++) typedef long long ll ; ll MOD = 0x7fffffff ; int n ; char graph[1010][1010] ; int vis[1010][1010] ; ll dp[1010][1010] ; int q[1010*1010][2] ; int tab[4][2] = {{0,-1},{0,1},{-1,0},{1,0}} ; void bfs() { 阅读全文
