var toBin = (n) => {

  if(n == 0) return '0';

  var res = '';

  while(n != 0) {

      res = n % 2 + res

      n = parseInt(n / 2)

   }

   return res;

}

var toDecimal = (s) => {

  var res = 0;

  var arr = s.split('');

  var len = arr.length;

  for(var i = 0;i<len;i++) {

    res += +arr[i] * Math.pow(2, len-1-i)

  }

  return res;

}

for(var i = 0;i<100000;i++) {

    if(i != toDecimal(toBin(i))) console.log(i);

}

console.log('end!')