Unique question codeforces round 923

Codeforces/contest1927/A.cpp

@@ -0,0 +1,38 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int how_many(string c, int index) {
+
+    int count = 0, start = 0, end = 0;
+
+    for(int i = 0; i < index; ++i) {
+
+        if(c[i] == 'B' && count == 0) {
+            count++;
+            start = i;
+        } 
+
+        if(c[i] == 'B' && count != 0)
+            end = i;
+
+    }
+
+    return end-start+1;
+
+}
+
+
+int main(void){
+
+    int n, index;
+    string c;
+
+    cin >> n;
+
+    for(int i = 0; i < n; ++i) {
+        cin >> index >> c;
+        cout << how_many(c, index) << endl;
+    }
+
+}