add aloha/2025cherry set

storage/aloha/py/2025cherry-div1-C.py

@@ -0,0 +1,33 @@
+import sys
+
+input = sys.stdin.readline
+
+
+class ReverseSortTracer:
+    def __init__(self, n, arr):
+        self.n = n
+        self.arr = arr
+
+    def sort_trace(self) -> list[tuple[int, int]]:
+        qx = []
+        sorted_arr = self.arr.copy()
+
+        for i in range(1, self.n):
+            l = i
+            r = sorted_arr.index(i) + 1
+            for ptr in range((r - l + 1) // 2):
+                sorted_arr[l + ptr - 1], sorted_arr[r - 1 - ptr] = \
+                    sorted_arr[r - 1 - ptr], sorted_arr[l + ptr - 1]
+            qx.append((l, r))
+
+        return qx
+
+
+if __name__ == "__main__":
+    n = int(input())
+    arr = list(map(int, input().split()))
+
+    solved = ReverseSortTracer(n, arr).sort_trace()
+    print(len(solved))
+    for pair in solved:
+        print(*pair)