Solution.ts

function isPalindrome(x: number): boolean {
    if (x < 0 || (x > 0 && x % 10 === 0)) {
        return false;
    }
    let y = 0;
    for (; y < x; x = ~~(x / 10)) {
        y = y * 10 + (x % 10);
    }
    return x === y || x === ~~(y / 10);
}