Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:12:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 12 | for(int i=0;i<a[nod].size()&&ok==0;i++){ | ~^~~~~~~~~~~~~~ main.cpp: In function 'void dfs2(int, int)': main.cpp:24:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for(int i=0;i<a[nod].size();i++) | ~^~~~~~~~~~~~~~