Problem:
Score : 200 points

Problem Statement

There are N balls placed in a row.
AtCoDeer the deer is painting each of these in one of the K colors of his paint cans.
For aesthetic reasons, any two adjacent balls must be painted in different colors.

Find the number of the possible ways to paint the balls.

Constraints

1≦N≦1000

2≦K≦1000

The correct answer is at most 2^{31}-1.

Input

The input is given from Standard Input in the following format:

N K

Output

Print the number of the possible ways to paint the balls.

Sample Input 1

2 2

Sample Output 1

2

We will denote the colors by 0 and 1. There are two possible ways: we can either paint the left ball in color 0 and the right ball in color 1, or paint the left in color 1 and the right in color 0.

Sample Input 2

1 10

Sample Output 2

10

Since there is only one ball, we can use any of the ten colors to paint it. Thus, the answer is ten.

Solution in JavaScript (node.js v5.12) (judge verdict: Wrong Answer)

'use strict'

function Main(input) {
    const tmp = input.split('\n')[0].split(' ');
    const N = Number(tmp[0]);
    const K = Number(tmp[1]);
    console.log(N, K);
    
    let result = K;

    if (N === 1) {
        console.log(result);
        return;
    }

    for (let i = 0; i < (N - 1); i++) {
        result *= (K - 1);
    }
    console.log(result);
    return;

}

Main(require('fs').readFileSync('/dev/stdin', 'utf8'));