結果

問題 No.806 木を道に
ユーザー GrenacheGrenache
提出日時 2019-04-27 16:26:21
言語 Java21
(openjdk 21)
結果
AC  
実行時間 165 ms / 2,000 ms
コード長 4,118 bytes
コンパイル時間 4,277 ms
コンパイル使用メモリ 77,820 KB
実行使用メモリ 40,368 KB
最終ジャッジ日時 2024-05-06 04:38:39
合計ジャッジ時間 7,672 ms
ジャッジサーバーID
（参考情報） 		judge5 / judge4
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 46 ms
37,220 KB
testcase_01 AC 46 ms
36,868 KB
testcase_02 AC 45 ms
37,004 KB
testcase_03 AC 47 ms
37,256 KB
testcase_04 AC 45 ms
36,804 KB
testcase_05 AC 45 ms
37,060 KB
testcase_06 AC 46 ms
37,004 KB
testcase_07 AC 45 ms
36,804 KB
testcase_08 AC 46 ms
36,924 KB
testcase_09 AC 46 ms
36,924 KB
testcase_10 AC 103 ms
39,608 KB
testcase_11 AC 102 ms
39,444 KB
testcase_12 AC 154 ms
39,992 KB
testcase_13 AC 142 ms
39,888 KB
testcase_14 AC 151 ms
39,912 KB
testcase_15 AC 165 ms
39,928 KB
testcase_16 AC 114 ms
39,612 KB
testcase_17 AC 148 ms
40,028 KB
testcase_18 AC 85 ms
38,228 KB
testcase_19 AC 102 ms
39,760 KB
testcase_20 AC 150 ms
39,904 KB
testcase_21 AC 127 ms
39,748 KB
testcase_22 AC 157 ms
40,368 KB
testcase_23 AC 156 ms
40,264 KB
testcase_24 AC 134 ms
39,780 KB
testcase_25 AC 152 ms
39,936 KB
testcase_26 AC 109 ms
39,484 KB
testcase_27 AC 158 ms
39,984 KB
testcase_28 AC 74 ms
37,988 KB
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ソースコード

diff # 

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


public class Main_yukicoder806 {

	private static Scanner sc;
	private static Printer pr;

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

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

		int ans = 0;
		for (int e : cnt) {
			ans += Math.max(0, e - 2);
		}

		pr.println(ans);
	}

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

	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();
			}
		}
	}

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