1893. Check if All the Integers in a Range Are Covered Easy

@problem@discussion
#Array#Hash Table#Prefix Sum



1/**
2 * [1893] Check if All the Integers in a Range Are Covered
3 *
4 * You are given a 2D integer array ranges and two integers left and right. Each ranges[i] = [starti, endi] represents an inclusive interval between starti and endi.
5 * Return true if each integer in the inclusive range [left, right] is covered by at least one interval in ranges. Return false otherwise.
6 * An integer x is covered by an interval ranges[i] = [starti, endi] if starti <= x <= endi.
7 *  
8 * Example 1:
9 * 
10 * Input: ranges = [[1,2],[3,4],[5,6]], left = 2, right = 5
11 * Output: true
12 * Explanation: Every integer between 2 and 5 is covered:
13 * - 2 is covered by the first range.
14 * - 3 and 4 are covered by the second range.
15 * - 5 is covered by the third range.
16 * 
17 * Example 2:
18 * 
19 * Input: ranges = [[1,10],[10,20]], left = 21, right = 21
20 * Output: false
21 * Explanation: 21 is not covered by any range.
22 * 
23 *  
24 * Constraints:
25 * 
26 * 	1 <= ranges.length <= 50
27 * 	1 <= starti <= endi <= 50
28 * 	1 <= left <= right <= 50
29 * 
30 */
31pub struct Solution {}
32
33// problem: https://leetcode.com/problems/check-if-all-the-integers-in-a-range-are-covered/
34// discuss: https://leetcode.com/problems/check-if-all-the-integers-in-a-range-are-covered/discuss/?currentPage=1&orderBy=most_votes&query=
35
36// submission codes start here
37
38impl Solution {
39    pub fn is_covered(ranges: Vec<Vec<i32>>, left: i32, right: i32) -> bool {
40        false
41    }
42}
43
44// submission codes end
45
46#[cfg(test)]
47mod tests {
48    use super::*;
49
50    #[test]
51    fn test_1893() {
52    }
53}
54


Back
© 2025 bowen.ge All Rights Reserved.