Introduction

In this blog post, we will explore how to solve the LeetCode problem "506" using AI. LeetCode is a popular platform for preparing for coding interviews, and with the help of AI tools like Chatmagic, we can generate solutions quickly and efficiently - helping you pass the interviews and get the job offer without having to study for months.

Problem Statement

You are given an integer array score of size n, where score[i] is the score of the ith athlete in a competition. All the scores are guaranteed to be unique. The athletes are placed based on their scores, where the 1st place athlete has the highest score, the 2nd place athlete has the 2nd highest score, and so on. The placement of each athlete determines their rank: The 1st place athlete's rank is "Gold Medal". The 2nd place athlete's rank is "Silver Medal". The 3rd place athlete's rank is "Bronze Medal". For the 4th place to the nth place athlete, their rank is their placement number (i.e., the xth place athlete's rank is "x"). Return an array answer of size n where answer[i] is the rank of the ith athlete. Example 1: Input: score = [5,4,3,2,1] Output: ["Gold Medal","Silver Medal","Bronze Medal","4","5"] Explanation: The placements are [1st, 2nd, 3rd, 4th, 5th]. Example 2: Input: score = [10,3,8,9,4] Output: ["Gold Medal","5","Bronze Medal","Silver Medal","4"] Explanation: The placements are [1st, 5th, 3rd, 2nd, 4th]. Constraints: n == score.length 1 <= n <= 104 0 <= score[i] <= 106 All the values in score are unique.

Explanation

• Sort and Rank: Sort the scores to determine the placement of each athlete. Create a mapping between scores and their ranks.
  • Create Result Array: Iterate through the original score array and use the mapping to determine the rank for each athlete.
  • Handle Special Cases: Specifically handle the "Gold Medal", "Silver Medal", and "Bronze Medal" ranks for the top three athletes.

• Runtime Complexity: O(n log n), Storage Complexity: O(n)

Code

    def award_medals(score: list[int]) -> list[str]:
    """
    Awards medals to athletes based on their scores.

    Args:
        score: A list of integers representing the scores of the athletes.

    Returns:
        A list of strings representing the rank of each athlete.
    """

    n = len(score)
    ranks = [0] * n
    sorted_scores = sorted(score, reverse=True)
    score_rank_map = {}

    for i in range(n):
        score_rank_map[sorted_scores[i]] = i + 1

    for i in range(n):
        rank = score_rank_map[score[i]]
        if rank == 1:
            ranks[i] = "Gold Medal"
        elif rank == 2:
            ranks[i] = "Silver Medal"
        elif rank == 3:
            ranks[i] = "Bronze Medal"
        else:
            ranks[i] = str(rank)

    return ranks