20 lines
254 B
Python
20 lines
254 B
Python
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import io
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import sys
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sys.stdin = io.StringIO('''2 3 1 3''') # 26
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a, h, b, k = map(int, input().split())
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c = 0
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while h > 0 and k > 0:
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c += a
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c += b
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h -= b
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k -= a
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if h > 0 > k:
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c += a * 10
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elif h <= 0 < k:
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c += b * 10
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print(c)
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