题解 | 小红的正整数构造

const rl = require("readline").createInterface({ input: process.stdin });
var iter = rl[Symbol.asyncIterator]();
const readline = async () => (await iter.next()).value;
 
//算不算这个数字本身啊？
void async function () {
    // Write your code here
    let line = await readline()
    line = line.split(' ').map(a=>parseInt(a))

    let left = line[0]
    let right = line[1]
    let num = line[2]

    let count = 1
    while(true){
        if(num*count>=left && num*count<=right){
            console.log(num*count)
            break
        }else if(num*count > right){
            console.log(-1)
            break
        }else{
            count++
        }
    }
}()

超绝笨拙答案

能用但是完全不优美！