[BAEKJOON] 1026번 : 보물 (JAVA)

- 알고리즘 분류 : 정렬

- 사용 언어 : JAVA

 

 

소스 설명은 주석을 참고해주세요.

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.StringTokenizer;

public class Main {

	public static void main(String[] args) throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int N = Integer.parseInt(br.readLine());
		
		int[] arr1 = new int[N];
		int[] arr2 = new int[N];
		
		StringTokenizer st = new StringTokenizer(br.readLine());
		for(int i=0; i<N; i++) {
			arr1[i] = Integer.parseInt(st.nextToken());
		}
		
		st = new StringTokenizer(br.readLine());
		for(int i=0; i<N; i++) {
			arr2[i] = Integer.parseInt(st.nextToken());
		}
		
		Arrays.sort(arr1);
		Arrays.sort(arr2);
		
		int sum = 0;
		for(int i=0; i<N; i++) {
			sum += (arr1[i] * arr2[N-1-i]);
		}
		
		System.out.println(sum);
	}

}