Package g0701_0800.s0715_range_module

Class RangeModule

  • public class RangeModule
extends Object
    715 - Range Module.

    Hard

    A Range Module is a module that tracks ranges of numbers. Design a data structure to track the ranges represented as half-open intervals and query about them.

    A half-open interval [left, right) denotes all the real numbers x where left <= x < right.

    Implement the RangeModule class:

    • RangeModule() Initializes the object of the data structure.
    • void addRange(int left, int right) Adds the half-open interval [left, right), tracking every real number in that interval. Adding an interval that partially overlaps with currently tracked numbers should add any numbers in the interval [left, right) that are not already tracked.
    • boolean queryRange(int left, int right) Returns true if every real number in the interval [left, right) is currently being tracked, and false otherwise.
    • void removeRange(int left, int right) Stops tracking every real number currently being tracked in the half-open interval [left, right).

    Example 1:

    Input

    [“RangeModule”, “addRange”, “removeRange”, “queryRange”, “queryRange”, “queryRange”]

    [ [], [10, 20], [14, 16], [10, 14], [13, 15], [16, 17]]

    Output: [null, null, null, true, false, true]

    Explanation:

     RangeModule rangeModule = new RangeModule();
 rangeModule.addRange(10, 20); 
 rangeModule.removeRange(14, 16); 
 rangeModule.queryRange(10, 14); // return True,(Every number in [10, 14) is being tracked) 
 rangeModule.queryRange(13, 15); // return False,(Numbers like 14, 14.03, 14.17 in [13, 15) are not being tracked) 
 rangeModule.queryRange(16, 17); // return True, (The number 16 in [16, 17) is still being tracked, despite the remove operation)

    Constraints:

    • 1 <= left < right <= 109
    • At most 104 calls will be made to addRange, queryRange, and removeRange.

    • Constructor Detail

      • RangeModule

        public RangeModule()

    • Method Detail

      • addRange

        public void addRange​(int left,
                     int right)

      • queryRange

        public boolean queryRange​(int left,
                          int right)

      • removeRange

        public void removeRange​(int left,
                        int right)