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 () {
    // Write your code here
    while ((line = await readline())) {
        let num = 0;
        let er = parseInt(line).toString(2);
        for (const i of er) {
            if (i === "1") num++;
        }
        console.log(num);
    }
})();