Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:17:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<L[nod].size();++j) ^ user.cpp:30:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<L[nod].size();++j) ^ user.cpp:35:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j<L[nod].size()-1) Pos[nod][j+3]=l; ^ user.cpp: In function ‘int main()’: user.cpp:80:9: warning: unused variable ‘cl’ [-Wunused-variable] int cl=l; l+=l-1; ^