30 lines
525 B
C++
30 lines
525 B
C++
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#include <iostream>
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using namespace std;
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int main() {
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int t;
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cin >> t;
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for (int i = 0; i < t; i++) {
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size_t n;
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cin >> n;
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std::string buffer;
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cin >> buffer;
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int first_b = -1;
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int last_b = -1;
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for (int j = 0; j < n; j++) {
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if (buffer[j] == 'B') {
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if (first_b == -1) {
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first_b = j;
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}
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last_b = j;
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}
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}
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cout << last_b - first_b + 1 << endl;
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}
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}
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