Compilare: main.cpp: In function 'int main()': main.cpp:65:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 65 | for(int i = 0; i < Xi.size(); i++){ | ~~^~~~~~~~~~~ main.cpp:66:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 66 | for(int j = 0; j < Yi.size(); j++){ | ~~^~~~~~~~~~~