import std.conv;
import std.stdio;
import std.string : chomp;

void main(string[] args)
{
    ulong l = 1, r = 2000000001;
    auto x = readln.chomp.to!ulong;
    do {
        immutable m = (r - l) / 2 + l;
        immutable sum = m * (m + 1) / 2;
        if (sum < x) {
            l = m + 1;
        } else if (sum > x) {
            r = m;
        } else {
            writeln("YES\n", m);
            return;
        }
    } while (l < r);
    writeln("NO");
}