結果
| 問題 |
No.2319 Friends+
|
| コンテスト | |
| ユーザー |
lam6er
|
| 提出日時 | 2025-03-20 20:18:10 |
| 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 | 209 ms |
| コンパイル使用メモリ | 82,540 KB |
| 実行使用メモリ | 176,524 KB |
| 最終ジャッジ日時 | 2025-03-20 20:19:08 |
| 合計ジャッジ時間 | 6,891 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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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()
lam6er