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for i in range(1, 10):
for j in range(1, i + 1):
print(f"{j}x{i}={i*j}", end=" ")
print()
def quick_sort(arr):
if len(arr) <= 1:
return arr
pivot = arr[len(arr)//2]
left = [x for x in arr if x < pivot]
mid = [x for x in arr if x == pivot]
right = [x for x in arr if x > pivot]
return quick_sort(left) + mid + quick_sort(right)