UVa 572 Oil Deposits

遇到一个@就把相连的@全变成‘*’，再cnt++就好

#include<iostream>#include<cstdio>#include<cstring>using namespace std;char oil[105][105];int m,n;void dfs(int i,int j);int main(){while(scanf("%d%d",&m,&n)&&m){int cnt=0;memset(oil,0,sizeof(oil));for(int i=0;i<m;i++) cin>>oil[i];for(int i=0;i<m;i++)for(int j=0;j<n;j++)if(oil[i][j]=='@')dfs(i,j),cnt++;cout<<cnt<<endl;}return 0;}void dfs(int i,int j){if(i<0||i>=m||j<0||j>=n) return ;oil[i][j]='*';for(int dx=-1;dx<=1;dx++)for(int dy=-1;dy<=1;dy++)if(oil[i+dx][j+dy]=='@') dfs(i+dx,j+dy);}