LeetCode 1936: Add Minimum Number of Rungs Solution

Master LeetCode problem 1936 (Add Minimum Number of Rungs), 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.

1936. Add Minimum Number of Rungs

Medium

Array Greedy

Problem Explanation

Explanation

We can solve this problem by iterating over the rungs and calculating the difference between the current rung and the next rung. If this difference is greater than the allowed distance dist, we need to add additional rungs to bridge the gap. The number of additional rungs needed can be calculated by dividing the difference by dist and taking the ceiling of the result.

Solution Code

class Solution {
    public int addRungs(int[] rungs, int dist) {
        int additionalRungs = 0;
        int currentHeight = 0;
        
        for (int rung : rungs) {
            additionalRungs += (rung - currentHeight - 1) / dist;
            currentHeight = rung;
        }
        
        return additionalRungs;
    }
}

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