Compilare: main.cpp: In function 'long long int solve(std::vector<std::pair<int, int> >&)': main.cpp:20:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < v.size(); ++i){ ~~^~~~~~~~~~ main.cpp:39:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); ++i){ ~~^~~~~~~~~~ main.cpp:56:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); ++i){ ~~^~~~~~~~~~ main.cpp:53:18: warning: 'cur_poz' may be used uninitialized in this function [-Wmaybe-uninitialized] v[cur_poz].second--; ^