Compilare: main.cpp: In function 'int get_flow()': main.cpp:68:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 68 | for(int i=0;i<graph[dest].size();i++) | ~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:114:29: warning: unused variable 'cost' [-Wunused-variable] 114 | int vec=x.first,cost=x.second; | ^~~~