题解 | 清楚姐姐买竹鼠
清楚姐姐买竹鼠
https://www.nowcoder.com/practice/816dfe69f83042108cf8c74531a94a35
a,b,x = map(int, input().split())
n = x // 3
m = x - n * 3
sum = 0
if b <= a * 3:
if a * m < b:
sum = n * b + m * a
else:
sum = (n + 1) * b
elif b > 3 * a:
sum = a * x
print(sum)
