add aloha/2025cherry set

storage/aloha/py/completed/2025cherry-div1-B.py

@@ -0,0 +1,19 @@
+import sys
+
+input = sys.stdin.readline
+
+
+class SeongjunEncryption:
+    def __init__(self, n, t):
+        self.n = n
+        self.t = t
+
+    def solve(self) -> bool:
+        return self.t[0] == 'A' and self.t[-1] == 'B'
+
+
+if __name__ == "__main__":
+    n = int(input())
+    t = input().strip()
+
+    print("Yes" if SeongjunEncryption(n, t).solve() else "No")