Compilare: main.cpp: In function 'int main()': main.cpp:74:21: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 74 | if ( ans.size() != m ) | ~~~~~~~~~~~^~~~ main.cpp:80:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 80 | for ( int i = 0 ; i < ans.size() ; i ++ ) | ~~^~~~~~~~~~~~