摘要：
1 #include <iostream> 2 #include <algorithm> 3 #include <vector> 4 #include <cstdio> 5 6 #define MAX 20 + 3 7 8 using namespace std; 9 10 const int dx[] = {-1,1,0,0};11 const int dy[] = {0,0,-1,1};12 13 int main(){14 int n,m;15 while( cin>>n>>m && n && 阅读全文