N = gets.to_i

ok = 10 ** 19
ng = 0

while (ok - ng).abs >= 2
  n = (ok + ng) / 2
  s = n * (1 + n) / 2

  if N <= s
    ok = n
  else
    ng = n
  end
end

if ok * (ok + 1) / 2 == N
  puts 'YES'
  puts ok
else
  puts 'NO'
end