LeetCode 1985: Find the Kth Largest Integer in the Array Solution
Master LeetCode problem 1985 (Find the Kth Largest Integer in the Array), a medium challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.
1985. Find the Kth Largest Integer in the Array
Problem Explanation
Explanation
To find the kth largest integer in the array, we can sort the array of strings based on the integer values they represent. Since the strings are guaranteed to represent integers without leading zeros, we can use a custom comparator to sort the strings in non-decreasing order. After sorting, we can simply return the kth element from the end of the sorted array.
Algorithmic Idea
- Convert the array of strings into integers and sort them in non-decreasing order.
- Return the kth element from the end of the sorted array.
Time Complexity
The time complexity of this approach is O(n log n), where n is the number of elements in the input array.
Space Complexity
The space complexity is O(n) to store the converted integers.
Solution Code
import java.util.Arrays;
class Solution {
public String kthLargestNumber(String[] nums, int k) {
Arrays.sort(nums, (a, b) -> {
if (a.length() == b.length()) {
return a.compareTo(b);
}
return a.length() - b.length();
});
return nums[nums.length - k];
}
}Try It Yourself
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