Compilare: main.cpp: In function 'int main()': main.cpp:35:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int>, std::allocator<std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | for(i = 0; i < graf[nod].size(); i++){ | ~~^~~~~~~~~~~~~~~~~~ main.cpp:15:32: warning: variable 'len' set but not used [-Wunused-but-set-variable] 15 | int n, m, i, a, b, c, nod, len, vec; | ^~~