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 () {
    // Write your code here
    while(line = await readline()){
        let num = parseInt(line);
        let str = num.toString(2);
        let res = 0;
        for(let i = 0;i<str.length;i++){
            if(str[i] === '1'){
                res++;
            }
        }
        console.log(res)
    }
}()