63 lines
1.3 KiB
Markdown
63 lines
1.3 KiB
Markdown
# A. Make it White
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[Codeforces.com](https://codeforces.com/contest/1927/problem/A)
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You have a horizontal strip of n cells. Each cell is either white or black.
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You can choose a continuous segment of cells once and paint them all white. After this action, all the black cells in this segment will become white, and the white ones will remain white.
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What is the minimum length of the segment that needs to be painted white in order for all n cells to become white?
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## Input
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The first line of the input contains a single integer t
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(1 ≤ t ≤ 104) — the number of test cases. The descriptions of the test cases follow.
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The first line of each test case contains a single integer n
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(1 ≤ n ≤ 10) — the length of the strip.
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The second line of each test case contains a string s, consisting of n characters,
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each of which is either 'W' or 'B'. The symbol 'W' denotes a white cell, and 'B' — a black one.
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It is guaranteed that at least one cell of the given strip is black.
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## Output
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For each test case, output a single number — the minimum length of a continuous segment of cells that needs to be painted white in order for the entire strip to become white.
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## Example
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Input
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```
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8
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6
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WBBWBW
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1
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B
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2
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WB
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3
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BBW
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4
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BWWB
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6
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BWBWWB
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6
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WWBBWB
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9
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WBWBWWWBW
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```
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Output
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```
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4
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1
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1
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2
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4
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6
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4
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7
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```
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