結果
| 問題 |
No.2146 2 Pows
|
| コンテスト | |
| ユーザー |
gew1fw
|
| 提出日時 | 2025-06-12 18:49:25 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 1,533 bytes |
| コンパイル時間 | 265 ms |
| コンパイル使用メモリ | 81,928 KB |
| 実行使用メモリ | 469,840 KB |
| 最終ジャッジ日時 | 2025-06-12 18:49:32 |
| 合計ジャッジ時間 | 5,868 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 3 TLE * 1 -- * 28 |
ソースコード
import heapq
def main():
import sys
input = sys.stdin.read
data = input().split()
N = int(data[0])
A = int(data[1])
B = int(data[2])
C = int(data[3])
max_a = 60 # Precompute up to 2^60 mod N
# Precompute 2^a mod N for a up to max_a
pow_mod = []
for a in range(max_a + 1):
pow_mod.append(pow(2, a, N))
# Initialize distance array: dist[residue][max_a] = minimal cost
INF = float('inf')
dist = [ [INF] * (max_a + 1) for _ in range(N) ]
heap = []
for a in range(max_a + 1):
r = pow_mod[a]
cost = A + B + C * a
if cost < dist[r][a]:
dist[r][a] = cost
heapq.heappush(heap, (cost, r, a))
while heap:
current_cost, current_r, current_m = heapq.heappop(heap)
if current_cost > dist[current_r][current_m]:
continue
for a in range(current_m, max_a + 1):
r_a = pow_mod[a]
new_r = (current_r + r_a) % N
added_B = B if a > current_m else 0
new_cost = current_cost + A + added_B + C * (a - current_m)
if new_cost < dist[new_r][a]:
dist[new_r][a] = new_cost
heapq.heappush(heap, (new_cost, new_r, a))
# Now compute the answer for each k
for k in range(N):
min_cost = INF
for a in range(max_a + 1):
if dist[k][a] < min_cost:
min_cost = dist[k][a]
print(min_cost)
if __name__ == '__main__':
main()
gew1fw