题目描述
Problem Statement
Takahashi has decided to put a web counter on his webpage.
The accesses to his webpage are described as follows:
- For $i=0,1,2,\ldots,23,$ there is a possible access at i o'clock every day:
- If c_i=T, Takahashi accesses the webpage with a probability of X percent.
- If c_i=A, Aoki accesses the webpage with a probability of Y percent.
-
Whether or not Takahashi or Aoki accesses the webpage is determined independently every time.
-
There is no other access.
Also, Takahashi believes it is preferable that the N-th access since the counter is put is not made by Takahashi himself.
If Takahashi puts the counter right before 0 o'clock of one day, find the probability, modulo 998244353, that the N-th access is made by Aoki.
Input
The input is given from Standard Input in the following format:
N X Y
$c_0 c_1 \ldots c_{23}$
Output
Print the answer.
Constraints
- $1 \leq N \leq 10^{18}$
- $1 \leq X,Y \leq 99$
- c_i is T or A.
- N, X, and Y are integers.
Sample Input 1
1 50 50
ATATATATATATATATATATATAT
Sample Output 1
665496236
The 1-st access since Takahashi puts the web counter is made by Aoki with a probability of $\frac{2}{3}$.
Sample Input 2
271 95 1
TTTTTTTTTTTTTTTTTTTTTTTT
Sample Output 2
0
There is no access by Aoki.
Sample Input 3
10000000000000000 62 20
ATAATTATATTTAAAATATTATAT
Sample Output 3
744124544
输入格式
见题面 Input 部分
输出格式
见题面 Output 部分