http://poj.org/problem?id=1164 #include<iostream> #include<string> #include<cmath> #include<algorithm> using namespace std; int mat[55][55]; int num; bool vist[55][55]; void DFS(int x,int y) { num++; vist[x][y]=true; if(mat[x][y]%2==0) //搜索该位置的西方 { if(!vist[x][y-1]) DFS(x,y-1); } mat[x][y]/=2; if(mat[x][y]%2==0) //搜索该位置的北方 { if(!vist[x-1][y]) DFS(x-1,y); } mat[x][y]/=2; if(mat[x][y]%2==0) //搜索该位置的东方 { if(!vist[x][y+1]) DFS(x,y+1); } mat[x][y]/=2; if(mat[x][y]%2==0) //搜索该位置的南方 { if(!vist[x+1][y]) DFS(x+1,y); } } int main() { int i,j,r,c,room,area; while(scanf("%d%d",&r,&c)!=EOF) { for(i=0;i<r;i++) for(j=0;j<c;j++) scanf("%d",&mat[i][j]); room=area=0; memset(vist,0,sizeof(vist)); for(i=0;i<r;i++) for(j=0;j<c;j++) if(!vist[i][j]) { room++; num=0; DFS(i,j); if(area<num) area=num; } printf("%dn",room); printf("%dn",area); } system("pause"); return 0; }
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