Compilare: main.cpp: In function 'bool bfs()': main.cpp:43:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | for (int i = 0; i < graph[current].size(); ++i) | ~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:97:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 97 | for (int i = 0; i < graph[N_DEST ].size(); ++i) | ~~^~~~~~~~~~~~~~~~~~~~~~~