結果
| 問題 |
No.2319 Friends+
|
| コンテスト | |
| ユーザー |
lam6er
|
| 提出日時 | 2025-04-15 21:34:05 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 2,110 bytes |
| コンパイル時間 | 255 ms |
| コンパイル使用メモリ | 81,884 KB |
| 実行使用メモリ | 62,496 KB |
| 最終ジャッジ日時 | 2025-04-15 21:36:07 |
| 合計ジャッジ時間 | 6,642 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / 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
import sys
from collections import defaultdict
def main():
input = sys.stdin.read().split()
ptr = 0
N, M = int(input[ptr]), int(input[ptr+1])
ptr += 2
P = list(map(int, input[ptr:ptr+N]))
ptr += N
current_world = [0] * (N + 1) # 1-based
for i in range(1, N+1):
current_world[i] = P[i-1]
friends = [[] for _ in range(N+1)] # friends[1], ..., friends[N]
for _ in range(M):
A = int(input[ptr])
B = int(input[ptr+1])
ptr +=2
friends[A].append(B)
friends[B].append(A)
# Initialize freq_maps and friend_worlds
freq_maps = [defaultdict(int) for _ in range(N+1)]
friend_worlds = [set() for _ in range(N+1)]
for X in range(1, N+1):
for F in friends[X]:
w = current_world[F]
freq_maps[X][w] += 1
for w, cnt in freq_maps[X].items():
if cnt > 0:
friend_worlds[X].add(w)
Q = int(input[ptr])
ptr +=1
for _ in range(Q):
X = int(input[ptr])
Y = int(input[ptr+1])
ptr +=2
if current_world[X] == current_world[Y]:
print("No")
continue
WY = current_world[Y]
if WY in friend_worlds[X]:
print("Yes")
W_old = current_world[X]
W_new = WY
current_world[X] = W_new
# Update all friends of X
for F in friends[X]:
# Decrement W_old in F's freq_map
old_count = freq_maps[F].get(W_old, 0)
if old_count == 1:
friend_worlds[F].discard(W_old)
if old_count > 0:
freq_maps[F][W_old] -= 1
if freq_maps[F][W_old] == 0:
del freq_maps[F][W_old]
# Increment W_new in F's freq_map
new_count = freq_maps[F].get(W_new, 0)
if new_count == 0:
friend_worlds[F].add(W_new)
freq_maps[F][W_new] = new_count + 1
else:
print("No")
if __name__ == "__main__":
main()
lam6er