function Main(input) {

  inputs = input.split('\n');

  let N = inputs[0].split(' ').map((e) => e - 0);

  let lb = 0;
  let ub = 10**9;
  while (lb <= ub) {
    let mb = lb + ub >> 1;
    let s = 0;
    for (let i = mb; i; i >>= 1) {
      s += i;
    }
    if (s == N) break;
    if (s < N) lb = mb + 1;
    else ub = mb - 1;
  }

  console.log(['NO', 'YES'][lb <= ub ? 1 : 0]);

}

Main(require('fs').readFileSync('/dev/stdin', 'utf8'));

function debug() {

  let input = document.getElementById('input').value;
  Main(input);

}