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- n = int(input())
- k = int(input())
- a = []
- a.append((0, k - 1))
- for i in range(0, n - 1):
- a.append((a[i][1], (k - 1) * (a[i][0] + a[i][1])))
- print(a[n - 1][0] + a[n - 1][1])
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