結果
問題 | No.1153 ねこちゃんゲーム |
ユーザー |
![]() |
提出日時 | 2025-06-12 14:23:52 |
言語 | PyPy3 (7.3.15) |
結果 |
WA
|
実行時間 | - |
コード長 | 1,694 bytes |
コンパイル時間 | 431 ms |
コンパイル使用メモリ | 82,276 KB |
実行使用メモリ | 134,728 KB |
最終ジャッジ日時 | 2025-06-12 14:24:18 |
合計ジャッジ時間 | 23,593 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 6 WA * 29 TLE * 1 -- * 4 |
ソースコード
def main(): import sys sys.setrecursionlimit(1 << 25) n, m = map(int, sys.stdin.readline().split()) a = list(map(int, sys.stdin.readline().split())) edges = [[] for _ in range(n+1)] for _ in range(n-1): u, v = map(int, sys.stdin.readline().split()) edges[u].append(v) edges[v].append(u) # Compute parent and g for each node parent = [0] * (n + 1) g = [0] * (n + 1) visited = [False] * (n + 1) stack = [(1, -1, False)] while stack: u, p, visited_flag = stack.pop() if visited_flag: mex_set = set() for v in edges[u]: if v == p: continue mex_set.add(g[v]) mex = 0 while mex in mex_set: mex += 1 g[u] = mex else: parent[u] = p visited[u] = True stack.append((u, p, True)) for v in edges[u]: if v != p and not visited[v]: stack.append((v, u, False)) # Calculate total XOR total = 0 for ai in a: total ^= g[ai] if total == 0: print("-1 -1") return # Find the first possible move for idx in range(m): u = a[idx] target = g[u] ^ total # Check each neighbor, excluding parent found = False for v in edges[u]: if v == parent[u]: continue if g[v] == target: print(idx + 1, v) return # If no move found, which shouldn't happen as per game theory print("-1 -1") if __name__ == "__main__": main()