Compilare: main.cpp: In function 'int pereche(int)': main.cpp:23:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | for (int i = 0; i < drum[x].size(); ++i) | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:89:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 89 | for (int i = 0; i < drum[x].size(); ++i) | ~~^~~~~~~~~~~~~~~~