[백준] 13458 시험 감독 - Greedy / Java

• 문제 링크

13458번: 시험 감독

 

• 풀이 과정

 

• 풀이 코드

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.StringTokenizer;

public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
		StringTokenizer st;

		int n = Integer.parseInt(br.readLine());
		int[] a = new int[n];

		st = new StringTokenizer(br.readLine());
		for (int i = 0; i < n; i++) {
			a[i] = Integer.parseInt(st.nextToken());
		}

		st = new StringTokenizer(br.readLine());
		int b = Integer.parseInt(st.nextToken());
		int c = Integer.parseInt(st.nextToken());

		long cnt = 0;
		for (int i = 0; i < n; i++) {
			a[i] -= b;
			cnt++;

			if (a[i] > 0) {
				cnt += a[i] / c;
				if (a[i] % c > 0) {
					cnt++;
				}
			}
		}

		bw.write(cnt + "\n");
		bw.flush();
	}

}