結果
問題 |
No.1787 Do Use Dynamic Tree
|
ユーザー |
![]() |
提出日時 | 2025-03-31 17:51:40 |
言語 | PyPy3 (7.3.15) |
結果 |
TLE
|
実行時間 | - |
コード長 | 1,544 bytes |
コンパイル時間 | 258 ms |
コンパイル使用メモリ | 82,880 KB |
実行使用メモリ | 105,692 KB |
最終ジャッジ日時 | 2025-03-31 17:52:42 |
合計ジャッジ時間 | 20,233 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 * 26 TLE * 1 -- * 11 |
ソースコード
import sys from sys import stdin def main(): sys.setrecursionlimit(1 << 25) N = int(stdin.readline()) adj = [[] for _ in range(N+1)] # 1-based for _ in range(N-1): a, b = map(int, stdin.readline().split()) adj[a].append(b) adj[b].append(a) val = list(range(N+1)) # val[i] is the value of node i Q = int(stdin.readline()) prev_x = 0 for _ in range(Q): ui, vi = map(int, stdin.readline().split()) # Compute encrypted u and v mod = N u = ((ui + (N - 1) + prev_x) % mod) + 1 v = ((vi + (N - 1) + prev_x) % mod) + 1 # Swap values val[u], val[v] = val[v], val[u] # Simulate the path to find ans current = u prev_node = -1 ans = current while True: next_nodes = [node for node in adj[current] if node != prev_node] if not next_nodes: break # Find max val and the candidates max_val = -1 candidates = [] for node in next_nodes: if val[node] > max_val: max_val = val[node] candidates = [node] elif val[node] == max_val: candidates.append(node) # Choose the candidate with largest node number next_node = max(candidates) prev_node = current current = next_node ans = current print(ans) prev_x = ans if __name__ == "__main__": main()