結果
| 問題 |
No.463 魔法使いのすごろく🎲
|
| コンテスト | |
| ユーザー |
lam6er
|
| 提出日時 | 2025-03-31 17:28:47 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 2,236 bytes |
| コンパイル時間 | 191 ms |
| コンパイル使用メモリ | 82,252 KB |
| 実行使用メモリ | 74,192 KB |
| 最終ジャッジ日時 | 2025-03-31 17:30:14 |
| 合計ジャッジ時間 | 3,539 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 17 WA * 19 |
ソースコード
def main():
import sys
input = sys.stdin.read().split()
idx = 0
n, m = int(input[idx]), int(input[idx+1])
idx +=2
if n > 2:
c = list(map(int, input[idx:idx+n-2]))
else:
c = []
cost = [0.0]*(n+1)
for i in range(2, n):
cost[i] = c[i-2]
# Precompute next_pos[i][j]
next_pos = [[0]*(m+1) for _ in range(n+1)]
for i in range(1, n+1):
for j in range(1, m+1):
current = i
for _ in range(j):
if current < n:
current +=1
else:
current -=1
next_pos[i][j] = current
# Initialize E0 and E1
E0 = [0.0]*(n+1)
E1 = [0.0]*(n+1)
epsilon = 1e-12
max_iter = 100000 # Prevent infinite loop
for _ in range(max_iter):
new_E0 = [0.0]*(n+1)
new_E1 = [0.0]*(n+1)
max_error = 0.0
for i in range(1, n+1):
if i == n:
new_E0[i] = 0.0
new_E1[i] = 0.0
continue
# Compute E1[i]
total1 = 0.0
for j in range(1, m+1):
next_i = next_pos[i][j]
total1 += E1[next_i]
new_E1_i = cost[i] + total1 / m
new_E1[i] = new_E1_i
# Compute E0[i]
min_e1 = float('inf')
for j in range(1, m+1):
next_i = next_pos[i][j]
if E1[next_i] < min_e1:
min_e1 = E1[next_i]
option1 = cost[i] + min_e1
total2 = 0.0
for j in range(1, m+1):
next_i = next_pos[i][j]
total2 += E0[next_i]
option2 = cost[i] + (total2 / m)
new_E0_i = min(option1, option2)
new_E0[i] = new_E0_i
# Update max_error
max_error = max(max_error, abs(new_E0_i - E0[i]), abs(new_E1_i - E1[i]))
# Check convergence
if max_error < epsilon:
break
E0, new_E0 = new_E0, E0
E1, new_E1 = new_E1, E1
print("{0:.10f}".format(E0[1]))
if __name__ == '__main__':
main()
lam6er