結果
問題 |
No.1787 Do Use Dynamic Tree
|
ユーザー |
![]() |
提出日時 | 2025-06-12 18:51:25 |
言語 | PyPy3 (7.3.15) |
結果 |
TLE
|
実行時間 | - |
コード長 | 1,533 bytes |
コンパイル時間 | 162 ms |
コンパイル使用メモリ | 82,640 KB |
実行使用メモリ | 160,428 KB |
最終ジャッジ日時 | 2025-06-12 18:51:47 |
合計ジャッジ時間 | 20,668 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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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 sys.setrecursionlimit(1 << 25) def main(): input = sys.stdin.read().split() ptr = 0 N = int(input[ptr]) ptr +=1 adj = [[] for _ in range(N+1)] # 1-based for _ in range(N-1): a = int(input[ptr]) b = int(input[ptr+1]) ptr +=2 adj[a].append(b) adj[b].append(a) Q = int(input[ptr]) ptr +=1 queries = [] for _ in range(Q): u = int(input[ptr]) v = int(input[ptr+1]) ptr +=2 queries.append((u, v)) # Initial values val = list(range(N+1)) # val[1] = 1, etc. x = 0 for (ui_orig, vi_orig) in queries: # Decrypt u and v u = ((ui_orig + N -1 + x) % N) +1 v = ((vi_orig + N -1 + x) % N) +1 # Swap val[u] and val[v] val[u], val[v] = val[v], val[u] # Simulate the greedy path from u current = u prev_node = -1 while True: next_node = -1 max_val = -1 for neighbor in adj[current]: if neighbor == prev_node: continue if val[neighbor] > max_val or (val[neighbor] == max_val and neighbor > next_node): max_val = val[neighbor] next_node = neighbor if next_node == -1: break prev_node = current current = next_node ans = current print(ans) x = ans if __name__ == '__main__': main()