結果
問題 |
No.2319 Friends+
|
ユーザー |
![]() |
提出日時 | 2025-03-20 18:45:00 |
言語 | PyPy3 (7.3.15) |
結果 |
TLE
|
実行時間 | - |
コード長 | 2,127 bytes |
コンパイル時間 | 165 ms |
コンパイル使用メモリ | 82,948 KB |
実行使用メモリ | 54,272 KB |
最終ジャッジ日時 | 2025-03-20 18:45:17 |
合計ジャッジ時間 | 8,026 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 | TLE * 1 -- * 44 |
ソースコード
from collections import defaultdict def main(): import sys input = sys.stdin.read data = input().split() idx = 0 N = int(data[idx]) idx += 1 M = int(data[idx]) idx += 1 P = list(map(int, data[idx:idx+N])) idx += N current_world = [0] * (N + 1) for i in range(N): current_world[i+1] = P[i] friends_adj = [[] for _ in range(N + 1)] for _ in range(M): A = int(data[idx]) B = int(data[idx+1]) friends_adj[A].append(B) friends_adj[B].append(A) idx += 2 # Initialize friends_in_ws and S friends_in_ws = [defaultdict(int) for _ in range(N + 1)] S = [set() for _ in range(N + 1)] for X in range(1, N + 1): for F in friends_adj[X]: W = current_world[F] friends_in_ws[X][W] += 1 # Populate S[X] for W in friends_in_ws[X]: if friends_in_ws[X][W] > 0: S[X].add(W) Q = int(data[idx]) idx += 1 output = [] for _ in range(Q): X = int(data[idx]) Y = int(data[idx+1]) idx += 2 if current_world[X] == current_world[Y]: output.append("No") continue WY = current_world[Y] if WY in S[X]: output.append("Yes") old_world = current_world[X] current_world[X] = WY for F in friends_adj[X]: # Process old world old_count = friends_in_ws[F].get(old_world, 0) if old_count > 0: new_count_old = old_count - 1 friends_in_ws[F][old_world] = new_count_old if new_count_old == 0: S[F].discard(old_world) # Process new world new_count = friends_in_ws[F].get(WY, 0) friends_in_ws[F][WY] = new_count + 1 if new_count == 0: S[F].add(WY) else: output.append("No") print('\n'.join(output)) if __name__ == '__main__': main()