function countNicePairs(nums: number[]): number {
    const MOD = 1000000007;
    let res = 0;
    const h = new Map<number, number>();
    for (const i of nums) {
        let temp = i, j = 0;
        while (temp > 0) {
            j = j * 10 + temp % 10;
            temp = Math.floor(temp / 10);
        }
        res = (res + (h.get(i - j) || 0)) % MOD;
        h.set(i - j, (h.get(i - j) || 0) + 1);
    }
    return res;
}
export default countNicePairs;