题解 | #求int型正整数在内存中存储时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 line = Number(await readline()).toString(2)
    let a = 1
    let reg =new RegExp(`${a}`,'ig')
    let oneNum =line.match(reg)
    console.log(oneNum.length)
}()