g0401_0500.s0436_find_right_interval

Class Solution

java.lang.Object

g0401_0500.s0436_find_right_interval.Solution

public class Solution
extends Object

436 - Find Right Interval.

Medium

You are given an array of intervals, where intervals[i] = [starti, endi] and each starti is unique.

The right interval for an interval i is an interval j such that startj >= endi and startj is minimized.

Return an array of right interval indices for each interval i. If no right interval exists for interval i, then put -1 at index i.

Example 1:

Input: intervals = [[1,2]]

Output: [-1]

Explanation: There is only one interval in the collection, so it outputs -1.

Example 2:

Input: intervals = [[3,4],[2,3],[1,2]]

Output: [-1,0,1]

Explanation:

There is no right interval for [3,4].

The right interval for [2,3] is [3,4] since start₀ = 3 is the smallest start that is >= end₁ = 3.

The right interval for [1,2] is [2,3] since start₁ = 2 is the smallest start that is >= end₂ = 2.

Example 3:

Input: intervals = [[1,4],[2,3],[3,4]]

Output: [-1,2,-1]

Explanation:

There is no right interval for [1,4] and [3,4].

The right interval for [2,3] is [3,4] since start₂ = 3 is the smallest start that is >= end₁ = 3.

Constraints:

• 1 <= intervals.length <= 2 * 104
• intervals[i].length == 2
• -106 <= starti <= endi <= 106
• The start point of each interval is unique.

Constructor Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
int[]	findRightInterval(int[][] intervals)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Solution

public Solution()

Method Detail

findRightInterval

public int[] findRightInterval(int[][] intervals)