Compilare: main.cpp: In function 'int main()': main.cpp:54:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for (i = 0; i < vfractii.size(); i++) | ~~^~~~~~~~~~~~~~~~~ main.cpp:58:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 58 | for (i = 1; i < vfractii.size(); i++) { | ~~^~~~~~~~~~~~~~~~~