240418 줄세우기

public static void main(String[] args) throws IOException {
	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
	StringBuilder sb = new StringBuilder();

	int n = Integer.parseInt(br.readLine());
	for (int tc = 1; tc <= n; tc++) {
		StringTokenizer st = new StringTokenizer(br.readLine(), " ");
		sb.append(st.nextToken()).append(" ");

		int[] arr = new int[20];
		int cnt = 0;
		for (int i = 0; i < arr.length; i++) {
			arr[i] = Integer.parseInt(st.nextToken());
		}

		for (int i = 0; i < arr.length; i++) {
			for (int j = 0; j < i; j++) {
				if (arr[j] > arr[i]) {
					cnt++;
				}
			}
		}
		sb.append(cnt).append('\n');
	}

	System.out.println(sb);
}

출처:https://www.acmicpc.net/problem/10431