Compilare: main.cpp: In function 'void dfs(int)': main.cpp:11:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 11 | for(int i=0;i<a[nod].size();i++) | ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:41:21: warning: unused variable 'ok' [-Wunused-variable] 41 | int ok=0,ok1=0,ok2=0; | ^~ main.cpp:41:26: warning: unused variable 'ok1' [-Wunused-variable] 41 | int ok=0,ok1=0,ok2=0; | ^~~ main.cpp:41:32: warning: unused variable 'ok2' [-Wunused-variable] 41 | int ok=0,ok1=0,ok2=0; | ^~~