A conveyor belt has packages that must be shipped from one port to another
within D
days.
The i
-th package on the conveyor belt has a weight of weights[i]
. Each
day, we load the ship with packages on the conveyor belt (in the order given
by weights
). We may not load more weight than the maximum weight capacity of
the ship.
Return the least weight capacity of the ship that will result in all the
packages on the conveyor belt being shipped within D
days.
Example 1:
Input: weights = [1,2,3,4,5,6,7,8,9,10], D = 5
Output: 15
Explanation:
A ship capacity of 15 is the minimum to ship all the packages in 5 days like this:
1st day: 1, 2, 3, 4, 5
2nd day: 6, 7
3rd day: 8
4th day: 9
5th day: 10
Note that the cargo must be shipped in the order given, so using a ship of capacity 14 and splitting the packages into parts like (2, 3, 4, 5), (1, 6, 7), (8), (9), (10) is not allowed.
Example 2:
Input: weights = [3,2,2,4,1,4], D = 3
Output: 6
Explanation:
A ship capacity of 6 is the minimum to ship all the packages in 3 days like this:
1st day: 3, 2
2nd day: 2, 4
3rd day: 1, 4
Example 3:
Input: weights = [1,2,3,1,1], D = 4
Output: 3
Explanation:
1st day: 1
2nd day: 2
3rd day: 3
4th day: 1, 1
Constraints:
1 <= D <= weights.length <= 50000
1 <= weights[i] <= 500
# @lc code=start
using LeetCode
function ship_within_days(weights::Vector{Int}, D::Int)
lo, hi = maximum(weights), sum(weights)
while lo < hi
mid = (lo + hi) ÷ 2
cnt = 1
tt = 0
for w in weights
tt += w
if tt > mid
cnt += 1
tt = w
end
end
cnt > D ? (lo = mid + 1) : (hi = mid)
end
return lo
end
# @lc code=end
ship_within_days (generic function with 1 method)
This notebook was generated using Literate.jl.