[BOJ] 1417 국회의원 선거 (JAVA)

https://www.acmicpc.net/problem/1417

1417번: 국회의원 선거

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Comparator;
import java.util.PriorityQueue;

public class Main {
	
    public static void main(String[] args) throws Exception {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int N = Integer.parseInt(br.readLine());
        if (N == 1) {
            System.out.print(0);
            return;
        }

        PriorityQueue<Integer> pq = new PriorityQueue<>(Comparator.reverseOrder());
        int me = Integer.parseInt(br.readLine());
        int cnt = 0;
        for (int i = 1; i < N; i++) {
            pq.offer(Integer.parseInt(br.readLine()));
        }

        while (true) {
            int max = pq.poll();
            if (max < me) break;
            cnt++;
            me++;
            pq.offer(max - 1);
        }

        System.out.print(cnt);

    }
	
}