Compilare: main.cpp: In function 'int main()': main.cpp:113:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 113 | for(int i=0;i<g.size();i++) | ~^~~~~~~~~ main.cpp: In function 'bool flux()': main.cpp:74:1: warning: control reaches end of non-void function [-Wreturn-type] 74 | } | ^