Compilare: main.cpp: In function 'void bfs()': main.cpp:62:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for (int i = 0; i < graf[u1].size(); i++) { | ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'bool dfs(int)': main.cpp:76:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 76 | for (int i = 0; i < graf[u1].size(); i++) { | ~~^~~~~~~~~~~~~~~~~