Compilare: user.cpp: In function ‘int getAns(std::vector<std::pair<int, int> >&, std::vector<std::pair<int, int> >&)’: user.cpp:32:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size() && v[i].first == 1; maxR = max(maxR, v[i].second), ++i); ^ user.cpp:37:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); ++i) { ^