LeetCode 57: Insert Interval Solution

Master LeetCode problem 57 (Insert Interval), 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.

57. Insert Interval

Medium

Array

Problem Explanation

Explanation:

To solve this problem, we need to iterate through the given intervals and newInterval and merge them in a sorted manner. We can follow these steps:

Initialize an empty list to store the merged intervals.
Iterate through the intervals and newInterval and merge them based on the overlapping conditions.
Add non-overlapping intervals directly to the result list.
Return the merged list of intervals.

Time Complexity: O(n), where n is the number of intervals in the input list. Space Complexity: O(n), to store the merged intervals.

Solution Code

class Solution {
    public int[][] insert(int[][] intervals, int[] newInterval) {
        List<int[]> result = new ArrayList<>();
        int i = 0;
        
        while (i < intervals.length && intervals[i][1] < newInterval[0]) {
            result.add(intervals[i]);
            i++;
        }
        
        while (i < intervals.length && intervals[i][0] <= newInterval[1]) {
            newInterval[0] = Math.min(newInterval[0], intervals[i][0]);
            newInterval[1] = Math.max(newInterval[1], intervals[i][1]);
            i++;
        }
        
        result.add(newInterval);
        
        while (i < intervals.length) {
            result.add(intervals[i]);
            i++;
        }
        
        return result.toArray(new int[result.size()][]);
    }
}

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