[BOJ] 백준 15903 카드 합체 놀이

[문제]

https://www.acmicpc.net/problem/15903

 

 

[소스 코드]

import java.io.*;
import java.util.*;
public class Main {
    public static void main(String[] args) throws IOException {
    	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    	StringTokenizer st = new StringTokenizer(br.readLine());
    	int n = Integer.parseInt(st.nextToken());
    	int m = Integer.parseInt(st.nextToken());
    	PriorityQueue<Long> pq = new PriorityQueue<>();
    	st = new StringTokenizer(br.readLine());
    	for(int i=0;i<n;i++) {
    		pq.add(Long.parseLong(st.nextToken()));
    	}
    	for(int i=0;i<m;i++) {
    		long a = pq.poll() + pq.poll();
    		pq.add(a);
    		pq.add(a);
    	}
    	long result = 0;
    	for(long v : pq) {
    		result += v;
    	}
    	System.out.println(result);
    }
}