結果

問題 No.1702 count good string
ユーザー tamato
提出日時 2021-10-08 22:10:29
言語 PyPy3
(7.3.15)
結果
AC  
実行時間 114 ms / 2,000 ms
コード長 1,010 bytes
コンパイル時間 675 ms
コンパイル使用メモリ 82,544 KB
実行使用メモリ 91,328 KB
最終ジャッジ日時 2024-07-23 04:34:39
合計ジャッジ時間 5,047 ms
ジャッジサーバーID
(参考情報)
judge1 / judge5
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 47
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

mod = 1000000007
eps = 10**-9
def main():
import sys
input = sys.stdin.readline
N = int(input())
S = input().rstrip('\n')
T = "yukicoder"
dp = [[0] * (N+1) for _ in range(19)]
dp[0][0] = 1
for i, s in enumerate(S):
for state in range(19):
if state < 9:
if s == T[state]:
dp[state + 1][i+1] = (dp[state + 1][i+1] + dp[state][i])%mod
elif s == "?":
dp[state + 10][i+1] = (dp[state + 10][i+1] + dp[state][i])%mod
dp[state][i+1] = (dp[state][i+1] + dp[state][i])%mod
elif 10 <= state < 18:
if s == T[state - 9]:
dp[state + 1][i+1] = (dp[state + 1][i+1] + dp[state][i])%mod
dp[state][i + 1] = (dp[state][i + 1] + dp[state][i]) % mod
else:
dp[state][i + 1] = (dp[state][i + 1] + dp[state][i]) % mod
print((dp[-1][-1] + dp[9][-1])%mod)
if __name__ == '__main__':
main()
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