結果
| 問題 |
No.2242 Cities and Teleporters
|
| コンテスト | |
| ユーザー |
gew1fw
|
| 提出日時 | 2025-06-12 15:10:38 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 2,484 bytes |
| コンパイル時間 | 344 ms |
| コンパイル使用メモリ | 82,304 KB |
| 実行使用メモリ | 232,072 KB |
| 最終ジャッジ日時 | 2025-06-12 15:11:19 |
| 合計ジャッジ時間 | 23,166 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| other | AC * 6 WA * 7 TLE * 1 -- * 12 |
ソースコード
import bisect
def main():
import sys
input = sys.stdin.read
data = input().split()
ptr = 0
N = int(data[ptr])
ptr += 1
H = list(map(int, data[ptr:ptr+N]))
ptr += N
T = list(map(int, data[ptr:ptr+N]))
ptr += N
Q = int(data[ptr])
ptr += 1
queries = []
for _ in range(Q):
A = int(data[ptr])
B = int(data[ptr+1])
queries.append((A-1, B-1)) # convert to 0-based
ptr += 2
# Preprocess
cities = list(zip(H, T, range(N)))
cities.sort()
prefix_max = []
max_so_far = -1
for h, t, idx in cities:
if t > max_so_far:
max_so_far = t
prefix_max.append(max_so_far)
# Precompute M for each city
max_steps = 20
M = []
for i in range(N):
h_i = H[i]
t_i = T[i]
current_M = [t_i]
current_T = t_i
for _ in range(max_steps):
x = current_T
# find the index where cities[j].H <= x, find the largest j
low = 0
high = N - 1
res = -1
while low <= high:
mid = (low + high) // 2
if cities[mid][0] <= x:
res = mid
low = mid + 1
else:
high = mid - 1
if res == -1:
max_t = current_T
else:
max_t = prefix_max[res]
if max_t == current_T:
current_M.append(max_t)
break
else:
current_M.append(max_t)
current_T = max_t
# Pad to max_steps+1 if necessary
while len(current_M) <= max_steps:
current_M.append(current_M[-1])
M.append(current_M[:max_steps + 1])
# Process queries
output = []
for a, b in queries:
target = H[b]
ma_list = M[a]
max_m = ma_list[-1]
if target > max_m:
output.append("-1")
continue
# Find the smallest k where ma_list[k-1] >= target
found = False
for k in range(1, len(ma_list) + 1):
if k-1 >= len(ma_list):
m = max_m
else:
m = ma_list[k-1]
if m >= target:
output.append(str(k))
found = True
break
if not found:
output.append("-1")
print('\n'.join(output))
if __name__ == '__main__':
main()
gew1fw