Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:19:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=(nod!=1);i<fii[nod].size();i++){ ~^~~~~~~~~~~~~~~~ user.cpp: In function ‘int cb(int)’: user.cpp:35:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i+p<stk.size() &&stk[i+p].first<=a) i+=p; ~~~^~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:78:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<parc.size()-1;i++){ ~^~~~~~~~~~~~~~ user.cpp:80:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (aux<stk.size()) ans[parc[i]]=max(ans[parc[i]],stk[aux].second+i); ~~~^~~~~~~~~~~