Compilare: main.cpp: In function 'int main()': main.cpp:49:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | for (int j = 1; j < ans[idx ^ 1].size(); j++) { | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:62:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for (int i = 1; i < ans[idx ^ 1].size(); i++) | ~~^~~~~~~~~~~~~~~~~~~~~