题解 | #自守数#
自守数
https://www.nowcoder.com/practice/88ddd31618f04514ae3a689e83f3ab8e
const readline = require("readline");
const rl = readline.createInterface({
input: process.stdin,
output: process.stdout,
});
rl.on("line", function (line: string) {
const num = parseInt(line);
let count = 0;
for (let i = 0; i <= num; i++) {
const sqrtStr = String(i * i);
const tail = sqrtStr.substring(sqrtStr.length - String(i).length);
if (tail === String(i)) {
count++;
}
}
console.log(count);
});
