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2347_best_poker_hand.md

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You are given an integer array ranks and a character array suits. You have 5 cards where the ith card has a rank of ranks[i] and a suit of suits[i].

The following are the types of poker hands you can make from best to worst:

  1. "Flush": Five cards of the same suit.
  2. "Three of a Kind": Three cards of the same rank.
  3. "Pair": Two cards of the same rank.
  4. "High Card": Any single card.

Return a string representing the best type of poker hand you can make with the given cards.

Note that the return values are case-sensitive.

Example 1:

Input: ranks = [13,2,3,1,9], suits = ["a","a","a","a","a"]
Output: "Flush"
Explanation: The hand with all the cards consists of 5 cards with the same suit, so we have a "Flush".

Example 2:

Input: ranks = [4,4,2,4,4], suits = ["d","a","a","b","c"]
Output: "Three of a Kind"
Explanation: The hand with the first, second, and fourth card consists of 3 cards with the same rank, so we have a 
"Three of a Kind".
Note that we could also make a "Pair" hand but "Three of a Kind" is a better hand.
Also note that other cards could be used to make the "Three of a Kind" hand.

Example 3:

Input: ranks = [10,10,2,12,9], suits = ["a","b","c","a","d"]
Output: "Pair"
Explanation: The hand with the first and second card consists of 2 cards with the same rank, so we have a "Pair".
Note that we cannot make a "Flush" or a "Three of a Kind".

Solution

from collections import Counter
class Solution:
    def bestHand(self, ranks: List[int], suits: List[str]) -> str:
        suits = Counter(set(suits))
        ranks = Counter(ranks)
        if len(suits) == 1:
            return 'Flush'
        elif max(ranks.values()) >= 3:
            return 'Three of a Kind'
        elif max(ranks.values()) == 2:
            return 'Pair'
        else:
            return 'High Card'