Compilare: user.cpp: In function ‘int main()’: user.cpp:2:277: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] using namespace std;int main(){ifstream fin("3color.in");ofstream fout("3color.out");vector<int>my[1001];int ans[1001];int n, m;fin>>n>>m; for (int i(1),x,y; i<=m;i++) fin>>x>>y,my[x].push_back(y),my[y].push_back(x); for(int i(0),maxim=0;i<n;i++){ for (int j(0);j<my[i].size();j++) maxim=max(maxim,ans[my[i][j]]); ans[i]=maxim+1;fout<<maxim + 1<<" ";}} ^