[BOJ] 백준 2512 예산

[문제]

https://www.acmicpc.net/problem/2512

 

 

[소스 코드]

import java.io.*;
import java.util.*;

public class Main {
	static int n;
	static int[] budget;
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer st;
		n = Integer.parseInt(br.readLine());
		budget = new int[n];
		st = new StringTokenizer(br.readLine());
		for(int i=0;i<n;i++) {
			budget[i] = Integer.parseInt(st.nextToken());
		}
		int m = Integer.parseInt(br.readLine());
		Arrays.sort(budget);
		int start = 0;
		int end = budget[n-1];
		while(start<=end) {
			int mid = (start+end) / 2;
			if(can(mid)<=m) {
				start++;
			}
			else {
				end--;
			}
		}
		System.out.println(end);
	}
	private static int can(int mid) {
		int cnt = 0;
		for(int i=0;i<n;i++) {
			if(budget[i]<=mid) {
				cnt += budget[i];
			}
			else
				cnt += mid;
		}
		return cnt;
	}
}