Compilare: main.cpp: In function 'int bf(int, std::vector<int>*)': main.cpp:35:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | for (i = 0; i < l[vf].size(); i++) | ~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:77:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 77 | for (k = 0; k < l[2 * n + 1].size(); k++) | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:51:6: warning: unused variable 'e' [-Wunused-variable] 51 | {int e, flux = 0, i, j, k, x, y, mn; | ^