A, B, V = map(int, input().split())
answer = (V - B) / (A - B)
print(int(answer) + 1 if answer % 1 > 0 else int(answer))

e4b9c33be8f49addfce8cfdce800fef5292d79de
<mask token>

<mask token>
print(int(answer) + 1 if answer % 1 > 0 else int(answer))

A, B, V = map(int, input().split())
answer = (V - B) / (A - B)
print(int(answer) + 1 if answer % 1 > 0 else int(answer))
