Compilare: user.cpp: In function ‘int solve(std::vector<std::pair<int, int> >&)’: user.cpp:16:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i + 1 < v.size() && v[i + 1].second < poz) { ~~~~~~^~~~~~~~~~ user.cpp:20:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (j + 1 < v.size() && v[j + 1].first <= poz) { ~~~~~~^~~~~~~~~~ user.cpp: In function ‘void mk_unique()’: user.cpp:44:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < intervs.size(); i++) { ~~^~~~~~~~~~~~~~~~ user.cpp:46:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i + 1 < intervs.size() && intervs[i + 1].first <= intervs[i].second) ~~~~~~^~~~~~~~~~~~~~~~