javascript 牛客变风格了啊

let N = readline()
let coinCount = 0
let sum = 1024 - N;
while(sum > 0){
    if(sum >= 64){
        coinCount++
        sum -= 64
    }else if( sum >=16 && sum < 64){
        coinCount++
        sum -= 16
    }else if(sum >= 4 && sum < 16){
        coinCount++
        sum -= 4
    } else {
        coinCount++
        sum -= 1
    }
}
console.log(coinCount)