[BOJ] 백준 2110 공유기 설치

[문제]

https://www.acmicpc.net/problem/2110

 

 

[소스 코드]

import java.io.*;
import java.util.*;
public class Main {
	static int n,c;
	static int[] home;
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer st = new StringTokenizer(br.readLine());
		n = Integer.parseInt(st.nextToken());
		c = Integer.parseInt(st.nextToken());
		home = new int[n];
		for(int i=0;i<n;i++) {
			home[i] = Integer.parseInt(br.readLine());
		}
		Arrays.sort(home);
		int start = 0;
		int end = home[n-1] - home[0];
		while(start<=end) {
			int mid = (start+end) / 2;
			if(can(mid)) {
				start = mid + 1;
			}
			else {
				end = mid - 1; 
			}
		}
		System.out.println(end);
	}
	private static boolean can(int mid) {
		int cnt = 1;
		int origin = home[0];
		for(int i=1;i<n;i++) {
			if(home[i]-origin >= mid) {
				cnt++;
				origin = home[i];
			}
		}
		if(cnt>=c) {
			return true;
		}
		return false;
	}
}