結果
| 問題 |
No.1005 BOT対策
|
| コンテスト | |
| ユーザー |
lam6er
|
| 提出日時 | 2025-04-15 20:48:56 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 1,575 bytes |
| コンパイル時間 | 475 ms |
| コンパイル使用メモリ | 82,392 KB |
| 実行使用メモリ | 72,944 KB |
| 最終ジャッジ日時 | 2025-04-15 20:49:23 |
| 合計ジャッジ時間 | 2,953 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 * 3 |
| other | AC * 20 WA * 8 |
ソースコード
def compute_failure(t):
n = len(t)
fail = [0] * n
j = 0
for i in range(1, n):
while j > 0 and t[i] != t[j]:
j = fail[j-1]
if t[i] == t[j]:
j += 1
fail[i] = j
else:
fail[i] = 0
return fail
def main():
import sys
s = sys.stdin.readline().strip()
t = sys.stdin.readline().strip()
m = len(t)
n = len(s)
if m == 0:
print(0)
return
if m > n:
print(0)
return
failure = compute_failure(t)
INF = float('inf')
# Initialize DP table
dp = [[INF] * (m + 1) for _ in range(n + 1)]
dp[0][0] = 0
for i in range(n):
for j in range(m + 1):
if dp[i][j] == INF:
continue
# Option 1: Insert a '.' after current character
if dp[i+1][0] > dp[i][j] + 1:
dp[i+1][0] = dp[i][j] + 1
# Option 2: Do not insert, process current character
current_j = j
c = s[i]
while current_j > 0 and c != t[current_j]:
current_j = failure[current_j - 1]
if c == t[current_j]:
current_j += 1
else:
current_j = 0
if current_j < m:
if dp[i+1][current_j] > dp[i][j]:
dp[i+1][current_j] = dp[i][j]
min_ans = min(dp[n][:m])
if min_ans == INF:
print(-1)
else:
print(min_ans)
if __name__ == "__main__":
main()
lam6er