LeetCode 3192: Minimum Operations to Make Binary Array Elements Equal to One II Solution

Master LeetCode problem 3192 (Minimum Operations to Make Binary Array Elements Equal to One II), 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.

3192. Minimum Operations to Make Binary Array Elements Equal to One II

Medium

Array Dynamic Programming Greedy

Problem Explanation

Explanation:

To solve this problem, we can iterate through the array and calculate the number of operations required to make all elements to the right of each index equal to 1. We can do this by counting the number of 0s to the right of each index. Then, we choose the index that requires the minimum number of operations.

Initialize a variable result to store the total number of operations.
Iterate through the array from right to left.
For each index, count the number of 0s to the right of it.
Update the result by adding the minimum of the count of 0s to the right and the current value at the index.
Return the result.

Solution Code

class Solution {
    public int minOperations(int[] nums) {
        int result = 0;
        for (int i = nums.length - 1; i >= 0; i--) {
            if (nums[i] == 0) {
                int zerosCount = 1;
                while (i > 0 && nums[i - 1] == 0) {
                    zerosCount++;
                    i--;
                }
                result += Math.min(zerosCount, nums[i]);
            }
        }
        return result;
    }
}

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