Submission #3100516


Source Code Expand

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.HashMap;
import java.util.InputMismatchException;
import java.util.Map;
import java.util.StringTokenizer;

public class Main {

	public static void main(String[] args) throws IOException {
		InputStream inputStream = System.in;
		OutputStream outputStream = System.out;
		InputReader in = new InputReader(inputStream);
		PrintWriter out = new PrintWriter(outputStream);
		TaskX solver = new TaskX();
		solver.solve(1, in, out);
		out.close();
	}

	static int INF = 1 << 30;
	static long LINF = 1L << 55;
	static int MOD = 1000000007;
	static int[] mh4 = { 0, -1, 1, 0 };
	static int[] mw4 = { -1, 0, 0, 1 };
	static int[] mh8 = { -1, -1, -1, 0, 0, 1, 1, 1 };
	static int[] mw8 = { -1, 0, 1, -1, 1, -1, 0, 1 };

	static class TaskX {

		public void solve(int testNumber, InputReader in, PrintWriter out) {

			int n = in.nextInt();
			int[] h = new int[n];
			int[] hs = new int[n];
			int[] ht = new int[n];
			Map<Integer, Integer> map = new HashMap<>();
			for (int i = n-1; i >= 0; i--) {
				h[i] = in.nextInt();
				hs[i] = h[i];
				map.merge(h[i], 1, Integer::sum);
			}

			for (int v : map.values()) {
				if (v >= 2) {
					out.println(-1);
					return;
				}
			}

			Arrays.sort(hs);

			map = new HashMap<>();
			for (int i = 0; i < n; i++) {
				map.put(hs[i], i+1);
			}

			for (int i = 0; i < n; i++) {
				ht[i] = map.get(h[i]);
			}

			BIT bit = new BIT(n);
			long ans = 0;
			for (int i = 0; i < n; i++) {
				ans += bit.sum(ht[i]);
				bit.add(ht[i], h[i]);
			}

			out.println(ans);

		}

	}

	/**
	 * 1-indexed BinaryIndexTree
	 * */
	public static class BIT {

		// [1, n]
		int n;
		int[] bit;

		public BIT(int n) {
			this.n = n;
			bit = new int[n + 1];
		}

		// indexに値vを足す
		public void add(int i, int v) {
			for (int x = i; x < n + 1; x += x & -x) {
				bit[x] += v;
			}
		}

		// 区間和 [1, v] を求める
		// v[1] + ... + v[i]
		public long sum(int i) {
			long ret = 0;
			for (int x = i; x > 0; x -= x & -x) {
				ret += bit[x];
			}
			return ret;
		}

		// 区間和 [i, j] = [1, j] - [1, i-1]を求める
		// v[i] + ... + v[j]
		public long query(int i, int j) {
			return sum(j) - sum(i - 1);
		}
	}

	static class InputReader {
		BufferedReader in;
		StringTokenizer tok;

		public String nextString() {
			while (!tok.hasMoreTokens()) {
				try {
					tok = new StringTokenizer(in.readLine(), " ");
				} catch (IOException e) {
					throw new InputMismatchException();
				}
			}
			return tok.nextToken();
		}

		public int nextInt() {
			return Integer.parseInt(nextString());
		}

		public long nextLong() {
			return Long.parseLong(nextString());
		}

		public double nextDouble() {
			return Double.parseDouble(nextString());
		}

		public int[] nextIntArray(int n) {
			int[] res = new int[n];
			for (int i = 0; i < n; i++) {
				res[i] = nextInt();
			}
			return res;
		}

		public int[] nextIntArrayDec(int n) {
			int[] res = new int[n];
			for (int i = 0; i < n; i++) {
				res[i] = nextInt() - 1;
			}
			return res;
		}

		public long[] nextLongArray(int n) {
			long[] res = new long[n];
			for (int i = 0; i < n; i++) {
				res[i] = nextLong();
			}
			return res;
		}

		public long[] nextLongArrayDec(int n) {
			long[] res = new long[n];
			for (int i = 0; i < n; i++) {
				res[i] = nextLong() - 1;
			}
			return res;
		}

		public InputReader(InputStream inputStream) {
			in = new BufferedReader(new InputStreamReader(inputStream));
			tok = new StringTokenizer("");
		}
	}
}

Submission Info

Submission Time
Task E - Line up!
User tutuz
Language Java8 (OpenJDK 1.8.0)
Score 0
Code Size 3864 Byte
Status WA
Exec Time 420 ms
Memory 57980 KB

Judge Result

Set Name Sample Subtask1 All
Score / Max Score 0 / 0 0 / 30 0 / 70
Status
AC × 2
AC × 13
WA × 12
AC × 22
WA × 23
Set Name Test Cases
Sample subtask0_sample_01.txt, subtask0_sample_02.txt
Subtask1 subtask1_01.txt, subtask1_02.txt, subtask1_03.txt, subtask1_04.txt, subtask1_05.txt, subtask1_06.txt, subtask1_07.txt, subtask1_08.txt, subtask1_09.txt, subtask1_10.txt, subtask1_11.txt, subtask1_12.txt, subtask1_13.txt, subtask1_14.txt, subtask1_15.txt, subtask1_16.txt, subtask1_17.txt, subtask1_18.txt, subtask1_19.txt, subtask1_20.txt, subtask1_21.txt, subtask1_22.txt, subtask1_23.txt, subtask0_sample_01.txt, subtask0_sample_02.txt
All subtask0_sample_01.txt, subtask0_sample_02.txt, subtask1_01.txt, subtask1_02.txt, subtask1_03.txt, subtask1_04.txt, subtask1_05.txt, subtask1_06.txt, subtask1_07.txt, subtask1_08.txt, subtask1_09.txt, subtask1_10.txt, subtask1_11.txt, subtask1_12.txt, subtask1_13.txt, subtask1_14.txt, subtask1_15.txt, subtask1_16.txt, subtask1_17.txt, subtask1_18.txt, subtask1_19.txt, subtask1_20.txt, subtask1_21.txt, subtask1_22.txt, subtask1_23.txt, subtask2_01.txt, subtask2_02.txt, subtask2_03.txt, subtask2_04.txt, subtask2_05.txt, subtask2_06.txt, subtask2_07.txt, subtask2_08.txt, subtask2_09.txt, subtask2_10.txt, subtask2_11.txt, subtask2_12.txt, subtask2_13.txt, subtask2_14.txt, subtask2_15.txt, subtask2_16.txt, subtask2_17.txt, subtask2_18.txt, subtask2_19.txt, subtask2_20.txt
Case Name Status Exec Time Memory
subtask0_sample_01.txt AC 155 ms 27732 KB
subtask0_sample_02.txt AC 149 ms 23380 KB
subtask1_01.txt WA 170 ms 25812 KB
subtask1_02.txt WA 163 ms 24660 KB
subtask1_03.txt AC 172 ms 25940 KB
subtask1_04.txt AC 159 ms 23892 KB
subtask1_05.txt AC 157 ms 25940 KB
subtask1_06.txt AC 153 ms 25680 KB
subtask1_07.txt AC 147 ms 23252 KB
subtask1_08.txt AC 161 ms 24660 KB
subtask1_09.txt AC 166 ms 25940 KB
subtask1_10.txt AC 167 ms 26836 KB
subtask1_11.txt AC 164 ms 27988 KB
subtask1_12.txt AC 179 ms 26580 KB
subtask1_13.txt AC 163 ms 25288 KB
subtask1_14.txt WA 181 ms 25808 KB
subtask1_15.txt WA 181 ms 24148 KB
subtask1_16.txt WA 170 ms 25940 KB
subtask1_17.txt WA 165 ms 23760 KB
subtask1_18.txt WA 158 ms 26196 KB
subtask1_19.txt WA 169 ms 24020 KB
subtask1_20.txt WA 174 ms 25808 KB
subtask1_21.txt WA 159 ms 23892 KB
subtask1_22.txt WA 179 ms 25044 KB
subtask1_23.txt WA 171 ms 26320 KB
subtask2_01.txt AC 296 ms 44844 KB
subtask2_02.txt WA 356 ms 56416 KB
subtask2_03.txt AC 361 ms 57980 KB
subtask2_04.txt AC 246 ms 34128 KB
subtask2_05.txt AC 308 ms 43036 KB
subtask2_06.txt AC 285 ms 45836 KB
subtask2_07.txt AC 289 ms 45272 KB
subtask2_08.txt AC 290 ms 46912 KB
subtask2_09.txt AC 297 ms 46924 KB
subtask2_10.txt AC 296 ms 46332 KB
subtask2_11.txt WA 386 ms 53744 KB
subtask2_12.txt WA 384 ms 55912 KB
subtask2_13.txt WA 392 ms 55828 KB
subtask2_14.txt WA 400 ms 56388 KB
subtask2_15.txt WA 420 ms 54096 KB
subtask2_16.txt WA 389 ms 55652 KB
subtask2_17.txt WA 396 ms 56392 KB
subtask2_18.txt WA 402 ms 53768 KB
subtask2_19.txt WA 410 ms 56368 KB
subtask2_20.txt WA 401 ms 55848 KB