function main(input) {
  const n = parseInt(input[0]);
  const minStep = [];
  walk(1, n, minStep, 1);
  if(minStep[n]) {
    console.log(minStep[n]);
  } else {
    console.log(-1);
  }
}

function walk(now, n, minStep, step) {
  if(now < 1 || now > n) return;
  if(!minStep[now]) minStep[now] = step;
  if(minStep[now] < step) return;
  minStep[now] = step;
  const num = countOneBit(now);
  walk(now+num, n, minStep, step+1);
  walk(now-num, n, minStep, step+1);
}

function countOneBit(i) {
  let count = 0;
  while(i > 0) {
    if((i & 1) === 1) count++;
    i >>= 1;
  }
  return count;
}

main(require("fs").readFileSync("/dev/stdin", "utf8").split("\n"));