Compilare: main.cpp: In function 'int bellmanford(int)': main.cpp:39:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for (int i = 0; i < G[c].size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:21:9: warning: unused variable 'ok' [-Wunused-variable] 21 | int ok = 0; | ^~ main.cpp:22:15: warning: unused variable 'pas' [-Wunused-variable] 22 | long long pas = 0; | ^~~