Swift Coding Test Course, Cocktail Making

In this post, we will discuss how to solve algorithm problems using the Swift language. The topic of the problem is ‘Making Cocktails’.

Problem Description

You are a bartender working at a cocktail bar. There are various ingredients, and customers want cocktails with specific flavors. You need to find the optimal combination of cocktails that satisfies the customers’ requests using the given ingredients.

The desired flavors are defined in terms of a certain level of sweetness, bitterness, and sourness. Each ingredient has specific levels of these flavors, and you can provide the cocktail if it meets the required flavor levels set by the customer.

Based on the given list of ingredients and the customer’s requirements, find and display the combinations that satisfy the customer’s flavor preferences among all possible combinations.

Input Format

The first line contains the number of ingredients N (1 ≤ N ≤ 100). The next N lines provide the sweetness, bitterness, and sourness levels of each ingredient. The last line gives the minimum required levels of sweetness, bitterness, and sourness desired by the customer.

Each flavor level is between 1 and 100 inclusive.

Output Format

Output the combinations of ingredients that meet the customer’s requirements. Only print combinations where the flavor levels satisfy the customer’s requirements. Print all possible combinations, the count of combinations, and the flavor values of each combination.

Example

Input:

3
3 4 2
2 1 5
5 2 1
4 5 3
            

Output:

1: 5 4 5
2: 3 4 5
            

Problem Solving Process

To solve the problem, we follow these steps.

1. Understanding the Problem

Read the problem and clearly identify the requirements. The main focus is to find ingredient combinations that satisfy the flavor levels requested by the customer.

2. Handling Input Values

Process the number of ingredients and their respective flavor levels from the input and store them in a data structure such as an array or list.

3. Generating Combinations

Generate combinations of the given ingredients. You can use backtracking or bit masking techniques for this purpose. Generate all combinations and calculate the flavor levels for each combination.

4. Checking Customer Requirements

Check if each generated combination meets the customer’s requirements. Verify that each flavor level is above or equal to the minimum required levels set by the customer.

5. Outputting the Final Results

Output all combinations that meet the customer’s requirements. The output format should comply with the requirements.

Swift Code Implementation

Below is an example of how to implement the above algorithm in the Swift language.

import Foundation

func findCocktailCombinations(ingredients: [(Int, Int, Int)], target: (Int, Int, Int)) -> [[Int]] {
    var result = [[Int]]()
    let n = ingredients.count
    let totalCombinations = 1 << n

    for i in 1..= target.0 && bitter >= target.1 && sour >= target.2 {
            result.append(currentCombination)
        }
    }
    return result
}

// Input receiving
let ingredientCount = Int(readLine()!)!
var ingredients: [(Int, Int, Int)] = []
for _ in 0..

Conclusion

This post detailed the process of solving a Swift algorithm problem. We learned how to generate all cocktail combinations that meet the customer's requirements by using combination generation and condition-checking methods. Keep in mind how crucial problem understanding and approach are when taking coding tests. Continuous practice and pursuing efficient problem-solving strategies are essential.