Compilare: main.cpp: In function 'int main()': main.cpp:41:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long long i=0;i<a.size();++i){ ~^~~~~~~~~ main.cpp:42:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j+1<b.size()&&max(a[i]+b[j], s-a[i]-b[j])>max(a[i]+b[j+1], s-a[i]-b[j+1])) j++; ~~~^~~~~~~~~