Compilare: main.cpp: In function 'bool BellmanFord(long long int)': main.cpp:28:32: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | for(long long int i=0;i< G[x].size();i++){ | ~^~~~~~~~~~~~~ main.cpp:15:22: warning: unused variable 'c' [-Wunused-variable] 15 | long long int x, c; | ^