[JAVA]백준_2212_센서

문제링크

https://www.acmicpc.net/problem/2212

2212번: 센서

 

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));
		StringTokenizer st;
		
		int N = Integer.parseInt(br.readLine());
		int K = Integer.parseInt(br.readLine());
		
		int arr[] = new int[N];
		int diff[] = new int[N-1];
		
		st = new StringTokenizer(br.readLine());
		for(int i=0;i<N;i++) arr[i] = Integer.parseInt(st.nextToken());
		
		Arrays.sort(arr);
		
		for(int i=0;i<N-1;i++) diff[i] = arr[i+1]-arr[i];
		
		Arrays.sort(diff);
		
		int res = 0;
		for(int i=0;i<N-K;i++) res += diff[i];
		
		System.out.println(res);
	}
}