Compilare: user.cpp: In function ‘int main()’: user.cpp:38:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=k[col] && q.size() <= n; i++) q.insert(make_pair(0, i)); //every value in 1 -> h[i] ^ user.cpp:42:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v.size(); i++) { ^ user.cpp:81:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v.size(); i++) { ^