Compilare: main.cpp: In function 'int bfs(int, int)': main.cpp:20:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for (int i=0;i<v[t].size();++i) | ~^~~~~~~~~~~~ main.cpp: In function 'int dfs(int, int, int)': main.cpp:35:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | for (;ptr[nod]<v[nod].size();++ptr[nod]) | ~~~~~~~~^~~~~~~~~~~~~~