题解 | #查找输入整数二进制中1的个数#

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 ;
    while (/\d/.test(n = parseInt(await readline()))) {
        let cnt = 0;
        while (n) {
            n &= n - 1;
            cnt++;
        }
        console.log(cnt);
    }
})();