310744: CF1879C. Make it Alternating
Description
You are given a binary string $s$. A binary string is a string consisting of characters 0 and/or 1.
You can perform the following operation on $s$ any number of times (even zero):
- choose an integer $i$ such that $1 \le i \le |s|$, then erase the character $s_i$.
You have to make $s$ alternating, i. e. after you perform the operations, every two adjacent characters in $s$ should be different.
Your goal is to calculate two values:
- the minimum number of operations required to make $s$ alternating;
- the number of different shortest sequences of operations that make $s$ alternating. Two sequences of operations are different if in at least one operation, the chosen integer $i$ is different in these two sequences.
The first line contains one integer $t$ ($1 \le t \le 10^4$) — the number of test cases.
Each test case consists of one line containing the string $s$ ($1 \le |s| \le 2 \cdot 10^5$). The string $s$ consists of characters 0 and/or 1 only.
Additional constraint on the input:
- the total length of strings $s$ over all test cases does not exceed $2 \cdot 10^5$.
For each test case, print two integers: the minimum number of operations you have to perform, and the number of different shortest sequences of operations. Since the second number might be large, print its remainder modulo $998244353$.
ExampleInput3 10010 111 0101Output
1 2 2 6 0 1Note
In the first test case of the example, the shortest sequences of operations are:
- $[2]$ (delete the $2$-nd character);
- $[3]$ (delete the $3$-rd character).
In the second test case of the example, the shortest sequences of operations are:
- $[2, 1]$ (delete the $2$-nd character, then delete the $1$-st character);
- $[2, 2]$;
- $[1, 1]$;
- $[1, 2]$;
- $[3, 1]$;
- $[3, 2]$.
In the third test case of the example, the only shortest sequence of operations is $[]$ (empty sequence).
Output
输入数据格式:第一行包含一个整数 t(1 ≤ t ≤ 10^4),表示测试用例的数量。每个测试用例包含一行,是一个字符串 s(1 ≤ |s| ≤ 2 × 10^5),s 仅由字符 '0' 和 '1' 组成。所有测试用例中字符串 s 的总长度不超过 2 × 10^5。
输出数据格式:对于每个测试用例,输出两个整数:所需的最小操作次数和不同的最短操作序列的数量(第二个数对 998244353 取模)。
例如:
```
输入:
3
10010
111
0101
输出:
1 2
2 6
0 1
```题目大意:给定一个由字符 '0' 和 '1' 组成的二进制字符串 s。你可以对 s 进行任意次数(包括零次)的操作:选择一个整数 i(1 ≤ i ≤ |s|),然后擦除字符 s_i。你的目标是通过这些操作使得 s 变成交替的,即操作后 s 中的每两个相邻字符都不同。需要计算两个值:使 s 交替所需的最小操作次数,以及使 s 交替的不同最短操作序列的数量(两个操作序列如果至少在一个操作中选择的整数 i 不同,则视为不同)。输出每个测试用例的最小操作次数和不同最短操作序列的数量(第二个数对 998244353 取模)。 输入数据格式:第一行包含一个整数 t(1 ≤ t ≤ 10^4),表示测试用例的数量。每个测试用例包含一行,是一个字符串 s(1 ≤ |s| ≤ 2 × 10^5),s 仅由字符 '0' 和 '1' 组成。所有测试用例中字符串 s 的总长度不超过 2 × 10^5。 输出数据格式:对于每个测试用例,输出两个整数:所需的最小操作次数和不同的最短操作序列的数量(第二个数对 998244353 取模)。 例如: ``` 输入: 3 10010 111 0101 输出: 1 2 2 6 0 1 ```