結果
問題 | No.1424 Ultrapalindrome |
ユーザー | nephrologist |
提出日時 | 2021-03-12 22:30:24 |
言語 | PyPy3 (7.3.15) |
結果 |
WA
|
実行時間 | - |
コード長 | 1,201 bytes |
コンパイル時間 | 200 ms |
コンパイル使用メモリ | 82,304 KB |
実行使用メモリ | 96,896 KB |
最終ジャッジ日時 | 2024-10-14 13:02:21 |
合計ジャッジ時間 | 4,141 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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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 | 43 ms
54,016 KB |
testcase_01 | WA | - |
testcase_02 | AC | 43 ms
53,632 KB |
testcase_03 | AC | 42 ms
54,144 KB |
testcase_04 | WA | - |
testcase_05 | WA | - |
testcase_06 | AC | 42 ms
53,632 KB |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | WA | - |
testcase_18 | AC | 91 ms
81,132 KB |
testcase_19 | AC | 100 ms
82,804 KB |
testcase_20 | AC | 63 ms
70,272 KB |
testcase_21 | AC | 95 ms
82,296 KB |
testcase_22 | AC | 83 ms
80,276 KB |
testcase_23 | AC | 55 ms
66,304 KB |
testcase_24 | AC | 62 ms
69,888 KB |
testcase_25 | AC | 64 ms
69,248 KB |
testcase_26 | AC | 111 ms
84,144 KB |
testcase_27 | WA | - |
testcase_28 | AC | 87 ms
85,248 KB |
testcase_29 | WA | - |
testcase_30 | AC | 97 ms
96,524 KB |
testcase_31 | WA | - |
ソースコード
import sys from collections import deque input = sys.stdin.buffer.readline n = int(input()) graph = [[] for _ in range(n)] deg1 = [0] * n deg2 = [0] * n for _ in range(n - 1): a, b = map(int, input().split()) a, b = a - 1, b - 1 graph[a].append(b) graph[b].append(a) deg1[a] += 1 deg1[b] += 1 kouho = deque() haji = [] dist1 = [-1] * n done = [0] * n for i in range(n): if deg1[i] == 1: haji.append(i) def ok(): print("Yes") exit() def ng(): print("No") exit() ok() if n == 2 or n == 3: ok() # bfs # print("kouho", kouho) v = haji[0] dist1[v] = 0 kouho.append(v) while kouho: v = kouho.popleft() d = dist1[v] for u in graph[v]: if dist1[u] == -1: dist1[u] = d + 1 kouho.append(u) temp = dist1[haji[1]] for v in haji[1:]: if dist1[v] != temp: ng() kouho = deque() dist2 = [-1] * n v = haji[-1] dist2[v] = 0 kouho.append(v) while kouho: v = kouho.popleft() d = dist2[v] for u in graph[v]: if dist2[u] == -1: dist2[u] = d + 1 kouho.append(u) temp = dist2[haji[0]] for v in haji[:-1]: if dist2[v] != temp: ng() ok()