第九届蓝桥杯大赛个人赛省赛（软件类）Java真题 第六题 标题：递增三元组

package com.wzxy.test;

import java.util.Scanner;
/*
 * 标题：递增三元组
 */
public class Main2{
	
	static Scanner sc = new Scanner(System.in);
	static int N = sc.nextInt();
	static int sum = 0;
	
	static int A[] = new int[N];
	static int B[] = new int[N];
	static int C[] = new int[N];
	
	public static void main(String[] args) {
		input();
//		outAll();
		f();
		System.out.println(sum);
	}
	public static void input() {
		if(N>=1 && N<=100000) {			//对于100%的数据，1 <= N <= 100000 0 <= Ai, Bi, Ci <= 100000 
			for(int i=0;i<N;i++) {
				A[i] = sc.nextInt();
			}for(int i=0;i<N;i++) {
				B[i] = sc.nextInt();
			}for(int i=0;i<N;i++) {
				C[i] = sc.nextInt();
			}
		}
	}
	public static void f() {
		for(int i=0;i<N;i++) {
			for(int j=0;j<N;j++) {
				for(int k=0;k<N;k++) {
					if(A[i]<=B[j] && B[j]<=C[k] ) {	//Ai < Bj < Ck  
						sum++;
					}
				}
			}
		}
	}
	public static void outAll() {
		for(int i=0;i<N;i++) {
			System.out.print(A[i]+" ");
		}System.out.println();
		for(int i=0;i<N;i++) {
			System.out.print(B[i]+" ");
		}System.out.println();
		for(int i=0;i<N;i++) {
			System.out.print(C[i]+" ");
		}System.out.println();
	}
}