mirror of
https://gitlab.com/mfocko/LeetCode.git
synced 2024-11-09 15:59:06 +01:00
28 lines
654 B
Ruby
28 lines
654 B
Ruby
# @param {Integer[]} cost
|
|
# @return {Integer}
|
|
def min_cost_climbing_stairs(cost)
|
|
def get(cost, k)
|
|
if k < 0 || k >= cost.size then
|
|
return 0
|
|
end
|
|
return cost[k]
|
|
end
|
|
|
|
i = cost.size - 1
|
|
while i >= 0 do
|
|
cost[i] += [get(cost, i + 1), get(cost, i + 2)].min
|
|
i -= 1
|
|
end
|
|
|
|
return cost.take(2).min
|
|
end
|
|
|
|
RSpec.describe "min_cost_climbing_stairs" do
|
|
it "of [10,15,20] is 15" do
|
|
expect(min_cost_climbing_stairs([10,15,20])).to eq(15)
|
|
end
|
|
|
|
it "of [1,100,1,1,1,100,1,1,100,1] is 6" do
|
|
expect(min_cost_climbing_stairs([1,100,1,1,1,100,1,1,100,1])).to eq(6)
|
|
end
|
|
end
|