hdu 1241 Oil Deposits
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#include<iostream>char a[105][105];int n,m;using namespace std;int dfs(int x,int y){ int xx; int yy; a[x][y]='1'; for(int k=-1;k<2;k++) for(int l=-1;l<2;l++) { xx=x+k; yy=y+l; if(xx<0||xx>=n||yy<0||yy>=m||a[xx][yy]!='@') continue; dfs(xx,yy); }}int main(){ int i,j; while(cin>>n>>m) { if(n==0&&m==0) break; int count=0; for(i=0;i<n;i++) for(j=0;j<m;j++) cin>>a[i][j]; for(int b=0;b<n;b++) for(int c=0;c<m;c++) if(a[b][c]=='@') { count++; dfs(b,c); } cout<<count<<endl; }}
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