Compilare: main.cpp: In function 'int main()': main.cpp:34:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for(j=0; j<graf[nod].size(); j++) | ~^~~~~~~~~~~~~~~~~ main.cpp:13:19: warning: unused variable 'cost' [-Wunused-variable] 13 | int N,M,G,i,g,cost,a,b,j,cst; | ^~~~