結果

問題 No.482 あなたの名は
ユーザー GrenacheGrenache
提出日時 2017-02-10 22:34:50
言語 Java21
(openjdk 21)
結果
AC  
実行時間 187 ms / 2,000 ms
コード長 4,362 bytes
コンパイル時間 4,039 ms
コンパイル使用メモリ 77,940 KB
実行使用メモリ 53,504 KB
最終ジャッジ日時 2024-06-09 10:54:34
合計ジャッジ時間 7,810 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge5
このコードへのチャレンジ
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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 49 ms
50,228 KB
testcase_01 AC 47 ms
50,140 KB
testcase_02 AC 46 ms
50,296 KB
testcase_03 AC 47 ms
50,384 KB
testcase_04 AC 47 ms
50,384 KB
testcase_05 AC 48 ms
49,992 KB
testcase_06 AC 50 ms
50,152 KB
testcase_07 AC 51 ms
49,916 KB
testcase_08 AC 49 ms
50,036 KB
testcase_09 AC 51 ms
50,416 KB
testcase_10 AC 50 ms
50,152 KB
testcase_11 AC 50 ms
49,896 KB
testcase_12 AC 51 ms
50,148 KB
testcase_13 AC 50 ms
50,308 KB
testcase_14 AC 49 ms
49,904 KB
testcase_15 AC 180 ms
52,948 KB
testcase_16 AC 178 ms
53,372 KB
testcase_17 AC 179 ms
53,096 KB
testcase_18 AC 185 ms
52,740 KB
testcase_19 AC 169 ms
52,984 KB
testcase_20 AC 187 ms
52,688 KB
testcase_21 AC 170 ms
53,480 KB
testcase_22 AC 168 ms
53,036 KB
testcase_23 AC 179 ms
53,484 KB
testcase_24 AC 179 ms
53,356 KB
testcase_25 AC 166 ms
52,956 KB
testcase_26 AC 165 ms
52,932 KB
testcase_27 AC 181 ms
53,504 KB
testcase_28 AC 180 ms
52,792 KB
testcase_29 AC 161 ms
52,872 KB
testcase_30 AC 48 ms
50,480 KB
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ソースコード

diff # 

import java.io.*;
import java.util.*;


public class Main_yukicoder482 {

	private static Scanner sc;
	private static Printer pr;

	private static void solve() {
		int n = sc.nextInt();
		long k = sc.nextLong();

		int[] d = new int[n];
		int[] p = new int[n];
		for (int i = 0; i < n; i++) {
			d[i] = sc.nextInt();
			p[d[i] - 1] = i;
		}

		int cnt = 0;
		for (int i = 0; i < n; i++) {
			if (d[i] != i + 1) {
				int tmp = d[i];
				d[i] = d[p[i]];
				d[p[i]] = tmp;
				cnt++;
				p[tmp - 1] = p[i];
			}
		}

		if (k < cnt) {
			pr.println("NO");
		} else {
			if ((k - cnt) % 2 == 0) {
				pr.println("YES");
			} else {
				pr.println("NO");
			}
		}
	}

	// ---------------------------------------------------
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		pr = new Printer(System.out);

		solve();

		pr.close();
		sc.close();
	}

	@SuppressWarnings("unused")
	private static class Scanner {
		BufferedReader br;

		Scanner (InputStream in) {
			br = new BufferedReader(new InputStreamReader(in));
		}

		private boolean isPrintable(int ch) {
			return ch >= '!' && ch <= '~';
		}

		private boolean isCRLF(int ch) {
			return ch == '\n' || ch == '\r' || ch == -1;
		}

		private int nextPrintable() {
			try {
				int ch;
				while (!isPrintable(ch = br.read())) {
					if (ch == -1) {
						throw new NoSuchElementException();
					}
				}

				return ch;
			} catch (IOException e) {
				throw new NoSuchElementException();
			}
		}

		String next() {
			try {
				int ch = nextPrintable();
				StringBuilder sb = new StringBuilder();
				do {
					sb.appendCodePoint(ch);
				} while (isPrintable(ch = br.read()));

				return sb.toString();
			} catch (IOException e) {
				throw new NoSuchElementException();
			}
		}

		int nextInt() {
			try {
				// parseInt from Integer.parseInt()
				boolean negative = false;
				int res = 0;
				int limit = -Integer.MAX_VALUE;
				int radix = 10;

				int fc = nextPrintable();
				if (fc < '0') {
					if (fc == '-') {
						negative = true;
						limit = Integer.MIN_VALUE;
					} else if (fc != '+') {
						throw new NumberFormatException();
					}
					fc = br.read();
				}
				int multmin = limit / radix;

				int ch = fc;
				do {
					int digit = ch - '0';
					if (digit < 0 || digit >= radix) {
						throw new NumberFormatException();
					}
					if (res < multmin) {
						throw new NumberFormatException();
					}
					res *= radix;
					if (res < limit + digit) {
						throw new NumberFormatException();
					}
					res -= digit;

				} while (isPrintable(ch = br.read()));

				return negative ? res : -res;
			} catch (IOException e) {
				throw new NoSuchElementException();
			}
		}

		long nextLong() {
			try {
				// parseLong from Long.parseLong()
				boolean negative = false;
				long res = 0;
				long limit = -Long.MAX_VALUE;
				int radix = 10;

				int fc = nextPrintable();
				if (fc < '0') {
					if (fc == '-') {
						negative = true;
						limit = Long.MIN_VALUE;
					} else if (fc != '+') {
						throw new NumberFormatException();
					}
					fc = br.read();
				}
				long multmin = limit / radix;

				int ch = fc;
				do {
					int digit = ch - '0';
					if (digit < 0 || digit >= radix) {
						throw new NumberFormatException();
					}
					if (res < multmin) {
						throw new NumberFormatException();
					}
					res *= radix;
					if (res < limit + digit) {
						throw new NumberFormatException();
					}
					res -= digit;

				} while (isPrintable(ch = br.read()));

				return negative ? res : -res;
			} catch (IOException e) {
				throw new NoSuchElementException();
			}
		}

		float nextFloat() {
			return Float.parseFloat(next());
		}

		double nextDouble() {
			return Double.parseDouble(next());
		}

		String nextLine() {
			try {
				int ch;
				while (isCRLF(ch = br.read())) {
					if (ch == -1) {
						throw new NoSuchElementException();
					}
				}
				StringBuilder sb = new StringBuilder();
				do {
					sb.appendCodePoint(ch);
				} while (!isCRLF(ch = br.read()));

				return sb.toString();
			} catch (IOException e) {
				throw new NoSuchElementException();
			}
		}

		void close() {
			try {
				br.close();
			} catch (IOException e) {
//				throw new NoSuchElementException();
			}
		}
	}

	private static class Printer extends PrintWriter {
		Printer(PrintStream out) {
			super(out);
		}
	}
}
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