[BOJ] 1449 수리공 항승 (JAVA)

https://www.acmicpc.net/problem/1449

1449번: 수리공 항승

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

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

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer(br.readLine(), " ");
        int N = Integer.parseInt(st.nextToken());
        boolean[] lick = new boolean[2001];
        int K = Integer.parseInt(st.nextToken());
        st = new StringTokenizer(br.readLine(), " ");
        for (int i = 0; i < N; i++) {
            lick[Integer.parseInt(st.nextToken())] = true;
        }

        int cnt = 0;
        for (int i = 1; i <= 1000; i++) {
            if (lick[i]) {
                cnt++;
                for (int j = i; j < i + K; j++) {
                    lick[j] = false;
                }
                i += K - 1;
            }
        }

        System.out.print(cnt);

    }

}