# @param {Integer[]} nums
# @param {Integer} target
# @return {Integer}
def search_insert(nums, target)
    left = 0
    right = nums.size

    while left < right do
        mid = (left + right).div(2)

        if nums[mid] == target then
            return mid
        elsif nums[mid] < target then
            left = mid + 1
        else
            right = mid
        end
    end

    return left
end

RSpec.describe "search_insert" do
    it "nums = [1,3,5,6], target = 5" do
        expect(search_insert([1,3,5,6], 5)).to eq(2)
    end

    it "nums = [1,3,5,6], target = 2" do
        expect(search_insert([1,3,5,6], 2)).to eq(1)
    end

    it "nums = [1,3,5,6], target = 7" do
        expect(search_insert([1,3,5,6], 7)).to eq(4)
    end
end