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Problem · Array

Choose the Best Flask

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Problem statement

A robotic chemical delivery system for a college chemistry laboratory has been configured to work using only one type of glass flask per day. For each chemical ordered, it will be filled to a mark that is at least equal to the volume ordered. There are multiple flasks available, each with markings at various levels. Given a list of order requirements and a list of flasks with their measurements, determine the single type of flask that will result in minimal waste. Waste is the sum of marking - requirement for each order. Return the zero-based index of the flask type chosen. If there are multiple answers, return the minimum index. If no flask will satisfy the constraints, return -1.

NOTE: The markings 2D array will be given in order of the flasks, i.e., the markings for the 0-index flask will be followed by markings of 1-index flask and so on. For each flask, the given markings will also be sorted in ascending order.

Function

chooseBestFlask(requirements: int[], markings: int[][]) → int

Examples

Example 1

requirements = [4, 6, 6, 7]markings = [[0, 3], [0, 5], [0, 7], [1, 6], [1, 8], [1, 9], [2, 3], [2, 5], [2, 6]]return = 0
The markings array is a 2D array where the first element is the flask number and the second an available marking. In this case, the first type has markings at 3, 5 and 7. The second type has them at 6, 8 and 9, and the third type has markings at 3, 5 and 6. Using the first flask type, the losses are 5-4=1, 7-6=1,7-6=1,7-7=0. 1+1+1+0=3 units wasted. Using the second flask type, losses are: 6-4 = 2, 6 - 6=0, 6-6=0, 8-7=1. 2+0 + 0 + 1 = 3 units wasted. The third flask type cannot be used because its maximum capacity is 6 and there is an order for 7. Two types of flasks can be used and 3 units will be lost. The lower index flask is at index 0.

Constraints

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public int chooseBestFlask(int[] requirements, int[][] markings) {
    // write your code here
}
requirements[4, 6, 6, 7]
markings[[0, 3], [0, 5], [0, 7], [1, 6], [1, 8], [1, 9], [2, 3], [2, 5], [2, 6]]
expected0
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