Compilare: main.cpp: In function 'void dfs(int)': main.cpp:12:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0;i < mu[nod].size();i++){ ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:46:11: warning: unused variable 'x' [-Wunused-variable] int t,x,y; ^ main.cpp:46:13: warning: unused variable 'y' [-Wunused-variable] int t,x,y; ^