Problem:
Power

For given integers m and n, compute mn (mod 1,000,000,007). Here, A (mod M) is the remainder when A is divided by M.

Input

m n

Two integers m and n are given in a line.

Output

Print mn (mod 1,000,000,007) in a line.

Constraints

1 ≤ m ≤ 100

1 ≤ n ≤ 109

Sample Input 1

2 3

Sample Output 1

8

Sample Input 2

5 8

Sample Output 2

390625

Solution in JAVA (judge verdict: Accepted)

import java.util.Scanner;

public class Main {
    public static final long mod7 = 1000000007L;
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        long n = sc.nextLong();
        long m = sc.nextLong();
        System.out.println(power(n, m, mod7));
    }

    public static long power(long n, long k, long mod) {
        if (k == 0) {
            return 1;
        }
        if (k % 2 == 0) {
            long t = power(n, k / 2, mod);
            return ((t % mod) * (t % mod)) % mod;
        }
        return n * power(n, k - 1, mod) % mod;
    }
}