我的一直90%，调了50分钟一直90%。。。块疯了都。。。 #include<iostream> #include<vector> using namespace std; void spread(vector<vector<int> > & island , int y , int x) { // cout<<x<<" "<<y; island[y][x] = 2; if(y-1>=0 && 1 == island[y-1][x]) spread(island, y-1 , x); if(y+1<island.size() && 1 == island[y+1][x]) spread(island, y+1 , x); if(x-1>=0 && 1 == island[y][x-1]) spread(island, y , x-1); if(x+1<island[0].size() && 1 == island[y][x+1]) spread(island, y , x+1); } int main() { int n , m; cin>>n>>m; vector<vector<int> > island(n, vector<int>(m)); char temp; for(int i = 0 ; i < n ; i++) { for(int j = 0 ; j < m ; j++) { cin>>temp; if('0' == temp) island[i][j] = 0; else if('1' == temp) island[i][j] = 1; else{ cout<<0<<endl; return 0; } } } int result = 0; for(int i = 0 ; i < n ; i++) { for(int j = 0 ; j < m ; j++) { if(1 != island[i][j])continue; result++; spread(island,i,j); } } cout<<result<<endl; return 0; }