240702 줄세우기

public static void main(String[] args) throws IOException {
	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
	int n = Integer.parseInt(br.readLine());
	int[] arr = new int[n];
	for (int i = 0; i < n; i++) {
		arr[i] = Integer.parseInt(br.readLine());
	}

	int[] dp = new int[n];
	int maxLength = 0;
	for (int i = 0; i < n; i++) {
		dp[i] = 1;
		for (int j = 0; j < i; j++) {
			if (arr[i] > arr[j]) {
				dp[i] = Math.max(dp[i], dp[j] + 1);
			}
		}
		maxLength = Math.max(maxLength, dp[i]);
	}

	System.out.println(n - maxLength);
}

출처:https://www.acmicpc.net/problem/2631