编辑代码

// 设置标准输入接口
const rl = require("readline").createInterface({ input: process.stdin });
var iter = rl[Symbol.asyncIterator]();
const readline = async () => (await iter.next()).value;

void (async function () {
  let n = Number(await readline());
  let res = 0;
  while (n > 1) {
    if (n % 2 == 0) {
      n = n / 2;
      res++;
    } else {
      const n1 = n + 1;
      if ((n1 / 2) % 2 == 0) {
        n = n1;
        res++;
      } else {
        n = n - 1;
        res++;
      }
    }
  }
  console.log(res);
})();