二十四 504. 转圈游戏 (快速幂)

504. 转圈游戏 (快速幂)

快速幂讲解

import java.util.*;

public class Main {
    private static int n, m, k, x;
    
    private static long qmi(long a, int b, int p) {
        long res = 1 % p;
        while (b > 0) {
            if ((b & 1) != 0) {
                res = (long)res * a % p;
            }
            a = (long)a * a % p;
            b >>= 1;
        }
        return res;
    }
    
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        n = sc.nextInt();
        m = sc.nextInt();
        k = sc.nextInt();
        x = sc.nextInt();
        System.out.println((x + (long)qmi(10, k, n) * m) % n);
    }
}