题解 | #自守数#
自守数
https://www.nowcoder.com/practice/88ddd31618f04514ae3a689e83f3ab8e
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
let line = await readline()
line = Number(line)
let res = 0
for (let i = 0; i <= line; i++) {
let tmp = String(i * i)
if (tmp.substring(tmp.length - String(i).length) === String(i)) {
res++
}
}
console.log(res)
}()
