Compilare: main.cpp: In function 'int main()': main.cpp:62:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<vec>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for (i = 0; i < muchii.size(); i++) | ~~^~~~~~~~~~~~~~~ main.cpp:46:23: warning: unused variable 'nr' [-Wunused-variable] 46 | int n, m, i, x, y,nr; | ^~ main.cpp:47:17: warning: unused variable 'dist' [-Wunused-variable] 47 | double long dist,c,ctot=0,a; | ^~~~