백준 13305 - 주유소 (파이썬)

Answer

n = int(input())
roads = list(map(int, input().split()))
costs = list(map(int, input().split()))

answer = 0
m = costs[0]

for i in range(n - 1):
    if costs[i] < m:
        m = costs[i]
    answer += roads[i] * m

print(answer)