Compilare: main.cpp: In function 'int main()': main.cpp:63:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(d < primes.size() && primes[d] * primes[d] <= n) { ~~^~~~~~~~~~~~~~~ main.cpp:85:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < divs.size(); i++) ~~^~~~~~~~~~~~~ main.cpp:95:57: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized] out << (ans - 1) / 2 + 1 << ' ' << x << ' ' << y << '\n'; ^~~~ main.cpp:95:45: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] out << (ans - 1) / 2 + 1 << ' ' << x << ' ' << y << '\n'; ^~~