Compilare: main.cpp: In function 'void bf_dist_x(int)': main.cpp:20:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for (i = 0; i < l[vf].size(); i++) | ~~^~~~~~~~~~~~~~ main.cpp: In function 'void optim_total()': main.cpp:44:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | for (j = 0; j < l[vf].size(); j++) | ~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:61:12: warning: unused variable 'j' [-Wunused-variable] 61 | {int m, i, j, z, t, nr = 0; | ^