Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:31:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[n].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:83:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(p<L[i].size()&&mins+l+1<L[i].size()) ^ user.cpp:83:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(p<L[i].size()&&mins+l+1<L[i].size()) ^ user.cpp:106:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(x=Sol[sol];x<L[sol].size()-1;x++) fout<<a[L[sol][x]]; ^