Compilare: main.cpp: In function 'int main()': main.cpp:35:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | for (int i = 0; i < v[f].size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:30:9: warning: unused variable 'cnt' [-Wunused-variable] 30 | int cnt = 0; | ^~~