Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:22:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<nod[x].size(); i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'void eulerTour()': main.cpp:53:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<l.size(); i++) maxip[i] = max(maxip[i-1], a[l[i]]); ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:80:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(la[x] < l.size() - 1) ans = max(ans, maxis[la[x]+1]); ~~~~~~^~~~~~~~~~~~~~