[BAEKJOON] 카드 구매하기

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

public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine());
		StringTokenizer st = new StringTokenizer(br.readLine());

        int[] arr = new int[n + 1];
        int[] d = new int[n + 1];

        for (int i = 1; i <= n; i++)
            arr[i] = Integer.parseInt(st.nextToken());

        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= i; j++) {
                d[i] = Math.max(d[i], d[i - j] + arr[j]);
            }
        }

        System.out.println(d[n]);
	}

}

 

[출처]

https://www.acmicpc.net/problem/11052