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LeetCode 769: Max Chunks To Make Sorted Solution

Master LeetCode problem 769 (Max Chunks To Make Sorted), 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.

769. Max Chunks To Make Sorted

Medium
ArrayStackGreedySortingMonotonic Stack

Problem Explanation

Explanation:

To solve this problem, we can iterate through the array and keep track of the maximum value seen so far. If at any point the maximum value is equal to the current index, we can conclude that we can split the array at that index.

Here is the algorithm:

  1. Initialize a variable chunks to 0 to keep track of the number of chunks.
  2. Initialize a variable maxValue to 0 to keep track of the maximum value seen so far.
  3. Iterate through the array:
    • Update maxValue to be the maximum of the current value and maxValue.
    • If maxValue is equal to the current index, increment chunks.
  4. Return the value of chunks.

Time Complexity: O(n) Space Complexity: O(1)

:

Solution Code

class Solution {
    public int maxChunksToSorted(int[] arr) {
        int chunks = 0;
        int maxValue = 0;
        for (int i = 0; i < arr.length; i++) {
            maxValue = Math.max(maxValue, arr[i]);
            if (maxValue == i) {
                chunks++;
            }
        }
        return chunks;
    }
}

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