Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:37:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<b[nod].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:73:16: warning: unused variable ‘j’ [-Wunused-variable] int ok=1,i,j; ^ user.cpp: In function ‘int pozitie(int, int)’: user.cpp:59:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘bool nr(int, int)’: user.cpp:70:1: warning: control reaches end of non-void function [-Wreturn-type] } ^