Compilare: main.cpp: In function 'bool bfs(int)': main.cpp:34:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for (int i = 0; i < g[u].size(); i++) { | ~~^~~~~~~~~~~~~ main.cpp: In function 'bool dfs(int)': main.cpp:50:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | for (int i = 0; i < g[u].size(); i++) { | ~~^~~~~~~~~~~~~