Compilare: main.cpp: In function 'std::vector<int> calc(std::vector<int>, bool)': main.cpp:67:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 67 | for (int i = 0; i < a.size(); i++) { | ~~^~~~~~~~~~ main.cpp:83:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 83 | for (int i = 0; i < l.size(); i++) { | ~~^~~~~~~~~~