Compilare: main.cpp: In function 'int main()': main.cpp:41:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | for(i=0;i<v[node].size();i++) | ~^~~~~~~~~~~~~~~ main.cpp:15:30: warning: unused variable 'source' [-Wunused-variable] 15 | int i,x,y,node,next,cost,source; | ^~~~~~