题解 | #快速乘#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        int q = in.nextInt();
        for(int i =0;i<q;i++){
            long a = in.nextInt();
            long b = in.nextInt();
            long p = in.nextInt();
            System.out.println(quickm(a,b,p));
        }
    }
    public static long quickm(long a,long b,long p){
        long ans = 0;
        while(b > 0){
            if(b%2==1){
                b-=1;
                ans = (ans + a)%p;
            }
            b/=2;
            a = (a+a)%p;
        }
        return ans;
    }
}