Package g0301_0400.s0352_data_stream_as_disjoint_intervals

Class SummaryRanges

java.lang.Object
g0301_0400.s0352_data_stream_as_disjoint_intervals.SummaryRanges
public class SummaryRanges extends Object
352 - Data Stream as Disjoint Intervals\. Hard Given a data stream input of non-negative integers a1, a2, ..., an, summarize the numbers seen so far as a list of disjoint intervals. Implement the `SummaryRanges` class: * `SummaryRanges()` Initializes the object with an empty stream. * `void addNum(int val)` Adds the integer `val` to the stream. * `int[][] getIntervals()` Returns a summary of the integers in the stream currently as a list of disjoint intervals [starti, endi]. **Example 1:** **Input** ["SummaryRanges", "addNum", "getIntervals", "addNum", "getIntervals", "addNum", "getIntervals", "addNum", "getIntervals", "addNum", "getIntervals"] [ [], [1], [], [3], [], [7], [], [2], [], [6], []] **Output:** [null, null, [[1, 1]], null, [[1, 1], [3, 3]], null, [[1, 1], [3, 3], [7, 7]], null, [[1, 3], [7, 7]], null, [[1, 3], [6, 7]]] **Explanation:** SummaryRanges summaryRanges = new SummaryRanges(); summaryRanges.addNum(1); // arr = [1] summaryRanges.getIntervals(); // return [[1, 1]] summaryRanges.addNum(3); // arr = [1, 3] summaryRanges.getIntervals(); // return [[1, 1], [3, 3]] summaryRanges.addNum(7); // arr = [1, 3, 7] summaryRanges.getIntervals(); // return [[1, 1], [3, 3], [7, 7]] summaryRanges.addNum(2); // arr = [1, 2, 3, 7] summaryRanges.getIntervals(); // return [[1, 3], [7, 7]] summaryRanges.addNum(6); // arr = [1, 2, 3, 6, 7] summaryRanges.getIntervals(); // return [[1, 3], [6, 7]] **Constraints:** * 0 <= val <= 104 * At most 3 * 104 calls will be made to `addNum` and `getIntervals`. **Follow up:** What if there are lots of merges and the number of disjoint intervals is small compared to the size of the data stream?

  • Constructor Details

    • SummaryRanges

      public SummaryRanges()

  • Method Details

    • addNum

      public void addNum(int val)

    • getIntervals

      public int[][] getIntervals()