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CF2178B.Impost or Sus
Impost or Sus
A string consisting of lowercase Latin letters is called suspicious if and only if all of the following conditions hold:
- The letter
sappears at least twice, and - For every occurrence of the letter
u, the two nearest occurrences ofsare the same number of characters away from theu.
After watching you finish a string task, your friend Aka has gifted you a string consisting only of letters s and u. You can perform the following operation on :
- Choose an index (), and set to
s.
Determine the minimum number of operations needed to make suspicious. It can be shown that, under the given constraints, it is always possible to transform into a suspicious string.
Input
Each test contains multiple test cases. The first line contains the number of test cases (). The description of the test cases follows.
The only line of each test case contains the string (). It is guaranteed that or u.
It is guaranteed that the sum of over all test cases does not exceed .
Output
For each test case, output a single integer — the minimum number of operations needed to make suspicious.
Note
In the first test case, the string sus is already suspicious because s appears twice in the string and the two nearest s to the only u are both character away: $\color{red}{\mathtt{s}}\underline{\mathtt{u}}\color{red}{\mathtt{s}}$.
In the second test case, it is optimal to perform the operation on indices , , and . After that, the string becomes suss. The string suss is suspicious because s appears times in the string and the two nearest s to the only u are both character away: $\color{red}{\mathtt{s}}\underline{\mathtt{u}}\color{red}{\mathtt{s}}\mathtt{s}$.
In the third test case, the condition on u is vacuously true because there is no u in the string sssss. Thus, the given string is already suspicious.
In the sixth test case, the initial string usssssss is not suspicious because the two nearest s to the only u are one and two characters away, respectively: $\underline{\mathtt{u}}\color{red}{\mathtt{ss}}\mathtt{sssss}$.
Samples
9
sus
uuuu
sssss
uusuuu
suuuuuu
usssssss
sssuuusss
susuusuuus
uuuuuuuuuuu
0
3
0
3
3
1
1
2
6
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