Compilare: main.cpp: In function 'void afis()': main.cpp:19:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for (int i = 0; i < f.size(); i++) | ~~^~~~~~~~~~ main.cpp: In function 'void bkt(long long int)': main.cpp:33:13: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | if (pos == f.size()) | ~~~~^~~~~~~~~~~