結果
問題 | No.482 あなたの名は |
ユーザー | hiromi_ayase |
提出日時 | 2017-02-10 23:40:49 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 121 ms / 2,000 ms |
コード長 | 3,362 bytes |
コンパイル時間 | 2,258 ms |
コンパイル使用メモリ | 77,500 KB |
実行使用メモリ | 40,212 KB |
最終ジャッジ日時 | 2024-06-09 11:26:38 |
合計ジャッジ時間 | 6,190 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
(要ログイン)
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 | 52 ms
36,832 KB |
testcase_01 | AC | 54 ms
36,580 KB |
testcase_02 | AC | 54 ms
36,660 KB |
testcase_03 | AC | 53 ms
36,336 KB |
testcase_04 | AC | 50 ms
36,856 KB |
testcase_05 | AC | 50 ms
36,480 KB |
testcase_06 | AC | 53 ms
36,856 KB |
testcase_07 | AC | 52 ms
36,744 KB |
testcase_08 | AC | 52 ms
36,340 KB |
testcase_09 | AC | 51 ms
36,864 KB |
testcase_10 | AC | 51 ms
36,864 KB |
testcase_11 | AC | 53 ms
36,768 KB |
testcase_12 | AC | 50 ms
36,352 KB |
testcase_13 | AC | 51 ms
36,340 KB |
testcase_14 | AC | 51 ms
36,856 KB |
testcase_15 | AC | 119 ms
39,884 KB |
testcase_16 | AC | 114 ms
39,836 KB |
testcase_17 | AC | 120 ms
39,628 KB |
testcase_18 | AC | 121 ms
39,616 KB |
testcase_19 | AC | 115 ms
39,948 KB |
testcase_20 | AC | 116 ms
40,080 KB |
testcase_21 | AC | 118 ms
40,212 KB |
testcase_22 | AC | 116 ms
39,936 KB |
testcase_23 | AC | 121 ms
39,980 KB |
testcase_24 | AC | 115 ms
39,644 KB |
testcase_25 | AC | 117 ms
39,988 KB |
testcase_26 | AC | 115 ms
39,440 KB |
testcase_27 | AC | 117 ms
39,884 KB |
testcase_28 | AC | 114 ms
39,736 KB |
testcase_29 | AC | 112 ms
39,864 KB |
testcase_30 | AC | 52 ms
36,864 KB |
ソースコード
import java.io.IOException; import java.io.InputStream; import java.util.NoSuchElementException; public class Main { public static void main(String[] args) { FastScanner sc = new FastScanner(); int N = sc.nextInt(); long K = sc.nextLong(); int[] D = new int[N]; for (int i = 0; i < N; i ++) { D[i] = sc.nextInt() - 1; } int count = 0; boolean[] visited = new boolean[N]; for (int i = 0; i < N; i ++) { if (!visited[i]) { count += dfs(i, i, D, 0, visited); } } if (count <= K && (K - count) % 2 == 0) { System.out.println("YES"); } else { System.out.println("NO"); } } private static int dfs(int first, int now, int[] D, int count, boolean[] visited) { visited[now] = true; if (first == D[now]) { return count; } return dfs(first, D[now], D, count + 1, visited); } } class FastScanner { public static String debug = null; private final InputStream in = System.in; private int ptr = 0; private int buflen = 0; private byte[] buffer = new byte[1024]; private boolean eos = false; private boolean hasNextByte() { if (ptr < buflen) { return true; } else { ptr = 0; try { if (debug != null) { buflen = debug.length(); buffer = debug.getBytes(); debug = ""; eos = true; } else { buflen = in.read(buffer); } } catch (IOException e) { e.printStackTrace(); } if (buflen < 0) { eos = true; return false; } else if (buflen == 0) { return false; } } return true; } private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1; } private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126; } private void skipUnprintable() { while (hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; } public boolean isEOS() { return this.eos; } public boolean hasNext() { skipUnprintable(); return hasNextByte(); } public String next() { if (!hasNext()) throw new NoSuchElementException(); StringBuilder sb = new StringBuilder(); int b = readByte(); while (isPrintableChar(b)) { sb.appendCodePoint(b); b = readByte(); } return sb.toString(); } public long nextLong() { if (!hasNext()) throw new NoSuchElementException(); long n = 0; boolean minus = false; int b = readByte(); if (b == '-') { minus = true; b = readByte(); } if (b < '0' || '9' < b) { throw new NumberFormatException(); } while (true) { if ('0' <= b && b <= '9') { n *= 10; n += b - '0'; } else if (b == -1 || !isPrintableChar(b)) { return minus ? -n : n; } else { throw new NumberFormatException(); } b = readByte(); } } public int nextInt() { return (int) nextLong(); } public long[] nextLongList(int n) { return nextLongTable(1, n)[0]; } public int[] nextIntList(int n) { return nextIntTable(1, n)[0]; } public long[][] nextLongTable(int n, int m) { long[][] ret = new long[n][m]; for (int i = 0; i < n; i ++) { for (int j = 0; j < m; j ++) { ret[i][j] = nextLong(); } } return ret; } public int[][] nextIntTable(int n, int m) { int[][] ret = new int[n][m]; for (int i = 0; i < n; i ++) { for (int j = 0; j < m; j ++) { ret[i][j] = nextInt(); } } return ret; } }