Compilare: main.cpp: In function 'int solve(int, int, int)': main.cpp:81:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | for(int i=0; i < ans.size();i++){ | ~~^~~~~~~~~~~~ main.cpp:82:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 82 | for(int j=0; j < ans.size();j++) | ~~^~~~~~~~~~~~