Compilare: user.cpp: In function ‘int main()’: user.cpp:135:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i < v.size(); ++i) ^ user.cpp:198:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (cur < counts.size() - 1 && counts[pos] < counts[cur+1]) ^