Compilare: user.cpp: In function ‘void bf(int)’: user.cpp:26:54: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[q.front()].size(); i++ ) ^ user.cpp:30:75: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(val[q.front()] == 0 || (val[q.front()] > v[q.front()].size())) ^ user.cpp:31:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[q.front()].size(); i++ ) ^ user.cpp: In function ‘int main()’: user.cpp:64:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<mk.size();i++) ^