QOJ.ac

QOJ

Time Limit: 1 s Memory Limit: 512 MB Total points: 100

#10442. 斐波那契字串

Statistics

位元字串嘅斐波那契字串序列定義如下:

$$ F(n)=\begin{cases} 0 & n=0,\\ 1 & n=1,\\ F(n-1)+F(n-2) & n\ge 2. \end{cases} $$

呢度 $+$ 代表串接字串。序列最初幾項係:

$n$ $F(n)$
$0$ $0$
$1$ $1$
$2$ $10$
$3$ $101$
$4$ $10110$
$5$ $10110101$
$6$ $1011010110110$
$7$ $101101011011010110101$
$8$ $1011010110110101101011011010110110$
$9$ $1011010110110101101011011010110110101101011011010110101$

畀定位元模式 $p$ 同一個數 $n$,$p$ 喺 $F(n)$ 入面出現幾多次?

輸入格式

每組測試資料嘅第一行包含整數 $n$($0 \le n \le 100$)。第二行包含位元模式 $p$。模式 $p$ 唔係空字串,長度最多有 $100\,000$ 個字元。

輸出格式

對每組測試資料,輸出佢嘅測試編號,之後輸出位元模式 $p$ 喺 $F(n)$ 入面出現嘅次數。各次出現可以重疊。出現次數會細過 $2^{63}$。

例子

輸入格式 1

6
10
7
10
6
01
6
101
96
10110101101101

輸出格式 1

Case 1: 5
Case 2: 8
Case 3: 4
Case 4: 4
Case 5: 7540113804746346428

Discussions

About Discussions

The discussion section is only for posting: General Discussions (problem-solving strategies, alternative approaches), and Off-topic conversations.

This is NOT for reporting issues! If you want to report bugs or errors, please use the Issues section below.

Open Discussions 0
No discussions in this category.

Issues

About Issues

If you find any issues with the problem (statement, scoring, time/memory limits, test cases, etc.), you may submit an issue here. A problem moderator will review your issue.

Guidelines:

  1. This is not a place to publish discussions, editorials, or requests to debug your code. Issues are only visible to you and problem moderators.
  2. Do not submit duplicated issues.
  3. Issues must be filed in English or Chinese only.
Active Issues 0
No issues in this category.
Closed/Resolved Issues 0
No issues in this category.