Compilare: main.cpp: In function 'int dfs(int, int)': main.cpp:130:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 130 | while(fr[nod]<a[nod].size()) | ~~~~~~~^~~~~~~~~~~~~~ main.cpp:145:1: warning: control reaches end of non-void function [-Wreturn-type] 145 | } | ^