Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:22:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<a[x].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:32:28: warning: variable ‘q’ set but not used [-Wunused-but-set-variable] int n,m,x,y,i,nr=0,z,p,q=1; ^ user.cpp:33:9: warning: unused variable ‘k’ [-Wunused-variable] int k[101]; ^