Compilare: main.cpp: In function 'int Solve(std::vector<std::pair<int, int> >)': main.cpp:68:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i< array.size(); ++i) ~^~~~~~~~~~~~~~ main.cpp:70:13: warning: unused variable 'x' [-Wunused-variable] int x = array[i].first; ^ main.cpp:89:22: warning: 'sol' may be used uninitialized in this function [-Wmaybe-uninitialized] ind[sol] = y; ~~~~~~~~~^~~