結果
| 問題 |
No.1787 Do Use Dynamic Tree
|
| コンテスト | |
| ユーザー |
lam6er
|
| 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()
lam6er