Compilare: main.cpp: In function 'void solve()': main.cpp:100:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 100 | for(int i=0;i<sol.size();i++) | ~^~~~~~~~~~~ main.cpp:115:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 115 | for(int i=0;i<sol.size();i++) | ~^~~~~~~~~~~