LeetCode 2990: Loan Types Solution

Problem Explanation

Explanation

To solve this problem, we need to iterate through the given list of loans and count the number of occurrences of each loan type. We can use a hashmap to store the loan types as keys and their counts as values. Finally, we return the hashmap containing the counts of each loan type.

Create a hashmap to store the counts of loan types.
Iterate through the list of loans, incrementing the count for each loan type in the hashmap.
Return the hashmap containing the counts of each loan type.

Time Complexity

The time complexity of this solution is O(n), where n is the number of loans in the input list.

Space Complexity

The space complexity of this solution is O(n) to store the hashmap of loan types.

Solution Code

import java.util.HashMap;
import java.util.List;
import java.util.Map;

class Solution {
    public Map<String, Integer> countLoanTypes(List<String> loans) {
        Map<String, Integer> counts = new HashMap<>();
        
        for (String loan : loans) {
            counts.put(loan, counts.getOrDefault(loan, 0) + 1);
        }
        
        return counts;
    }
}

Frequently Asked Questions

How to solve LeetCode 2990 (Loan Types)?

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What is the time complexity of LeetCode 2990 (Loan Types)?

The time complexity for LeetCode 2990 (Loan Types) varies by solution. Check the detailed explanation section for specific complexities in Java, C++, and Python implementations.

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2990. Loan Types