結果
問題 | No.1072 A Nice XOR Pair |
ユーザー | hiromi_ayase |
提出日時 | 2020-06-06 07:23:51 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 527 ms / 2,000 ms |
コード長 | 3,126 bytes |
コンパイル時間 | 2,284 ms |
コンパイル使用メモリ | 90,632 KB |
実行使用メモリ | 59,940 KB |
最終ジャッジ日時 | 2024-06-02 05:31:02 |
合計ジャッジ時間 | 6,379 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 67 ms
38,208 KB |
testcase_01 | AC | 67 ms
38,092 KB |
testcase_02 | AC | 67 ms
38,224 KB |
testcase_03 | AC | 67 ms
37,904 KB |
testcase_04 | AC | 67 ms
38,544 KB |
testcase_05 | AC | 68 ms
38,336 KB |
testcase_06 | AC | 96 ms
39,440 KB |
testcase_07 | AC | 527 ms
59,940 KB |
testcase_08 | AC | 396 ms
47,308 KB |
testcase_09 | AC | 353 ms
47,096 KB |
testcase_10 | AC | 356 ms
47,020 KB |
testcase_11 | AC | 397 ms
51,696 KB |
testcase_12 | AC | 449 ms
56,692 KB |
ソースコード
import java.util.HashMap; import java.util.Map; public class Main { private static void solve() { int n = ni(); int x = ni(); int[] a = na(n); long ret = 0; if (x > 0) { Map<Integer, Integer> map = new HashMap<>(); for (int v : a) { int u = x ^ v; if (map.containsKey(u)) { ret += map.get(u); } map.putIfAbsent(v, 0); map.put(v, map.get(v) + 1); } } else { Map<Integer, Integer> map = new HashMap<>(); for (int v : a) { map.putIfAbsent(v, 0); map.put(v, map.get(v) + 1); } for (Map.Entry<Integer, Integer> entry : map.entrySet()) { ret += (long) entry.getValue() * (entry.getValue() - 1) / 2; } } System.out.println(ret); } public static void main(String[] args) { new Thread(null, new Runnable() { @Override public void run() { long start = System.currentTimeMillis(); String debug = args.length > 0 ? args[0] : null; if (debug != null) { try { is = java.nio.file.Files.newInputStream(java.nio.file.Paths.get(debug)); } catch (Exception e) { throw new RuntimeException(e); } } reader = new java.io.BufferedReader(new java.io.InputStreamReader(is), 32768); solve(); out.flush(); tr((System.currentTimeMillis() - start) + "ms"); } }, "", 64000000).start(); } private static java.io.InputStream is = System.in; private static java.io.PrintWriter out = new java.io.PrintWriter(System.out); private static java.util.StringTokenizer tokenizer = null; private static java.io.BufferedReader reader; public static String next() { while (tokenizer == null || !tokenizer.hasMoreTokens()) { try { tokenizer = new java.util.StringTokenizer(reader.readLine()); } catch (Exception e) { throw new RuntimeException(e); } } return tokenizer.nextToken(); } private static double nd() { return Double.parseDouble(next()); } private static long nl() { return Long.parseLong(next()); } private static int[] na(int n) { int[] a = new int[n]; for (int i = 0; i < n; i++) a[i] = ni(); return a; } private static char[] ns() { return next().toCharArray(); } private static long[] nal(int n) { long[] a = new long[n]; for (int i = 0; i < n; i++) a[i] = nl(); return a; } private static int[][] ntable(int n, int m) { int[][] table = new int[n][m]; for (int i = 0; i < n; i++) { for (int j = 0; j < m; j++) { table[i][j] = ni(); } } return table; } private static int[][] nlist(int n, int m) { int[][] table = new int[m][n]; for (int i = 0; i < n; i++) { for (int j = 0; j < m; j++) { table[j][i] = ni(); } } return table; } private static int ni() { return Integer.parseInt(next()); } private static void tr(Object... o) { if (is != System.in) System.out.println(java.util.Arrays.deepToString(o)); } }