LeetCode 1899: Merge Triplets to Form Target Triplet Solution

Master LeetCode problem 1899 (Merge Triplets to Form Target Triplet), 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.

1899. Merge Triplets to Form Target Triplet

Medium

Array Greedy

Problem Explanation

Explanation

To determine if it is possible to obtain the target triplet [x, y, z] as an element of the given triplets, we can iterate through each triplet and update it based on the max values of the current triplet and the target triplet. If at any point we reach the target triplet, we return true. Otherwise, we return false.

Algorithm:

Initialize three variables to represent the current triplet elements.
Iterate through each triplet in the input array.
Update the current triplet by taking the max of each element with the corresponding element of the target triplet.
If the updated triplet is equal to the target triplet, return true.
If no triplet matches the target, return false.

Time Complexity: O(n), where n is the number of triplets. Space Complexity: O(1)

Solution Code

class Solution {
    public boolean mergeTriplets(int[][] triplets, int[] target) {
        int[] currentTriplet = new int[3];
        
        for (int[] triplet : triplets) {
            currentTriplet[0] = Math.max(currentTriplet[0], triplet[0]);
            currentTriplet[1] = Math.max(currentTriplet[1], triplet[1]);
            currentTriplet[2] = Math.max(currentTriplet[2], triplet[2]);
            
            if (Arrays.equals(currentTriplet, target)) {
                return true;
            }
        }
        
        return false;
    }
}

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