2841. Maximum Sum of Almost Unique Subarray Medium

1/**
2 * [2841] Maximum Sum of Almost Unique Subarray
3 *
4 * You are given an integer array nums and two positive integers m and k.
5 * Return the maximum sum out of all almost unique subarrays of length k of nums. If no such subarray exists, return 0.
6 * A subarray of nums is almost unique if it contains at least m distinct elements.
7 * A subarray is a contiguous non-empty sequence of elements within an array.
8 *  
9 * <strong class="example">Example 1:
10 * 
11 * Input: nums = [2,6,7,3,1,7], m = 3, k = 4
12 * Output: 18
13 * Explanation: There are 3 almost unique subarrays of size k = 4. These subarrays are [2, 6, 7, 3], [6, 7, 3, 1], and [7, 3, 1, 7]. Among these subarrays, the one with the maximum sum is [2, 6, 7, 3] which has a sum of 18.
14 * 
15 * <strong class="example">Example 2:
16 * 
17 * Input: nums = [5,9,9,2,4,5,4], m = 1, k = 3
18 * Output: 23
19 * Explanation: There are 5 almost unique subarrays of size k. These subarrays are [5, 9, 9], [9, 9, 2], [9, 2, 4], [2, 4, 5], and [4, 5, 4]. Among these subarrays, the one with the maximum sum is [5, 9, 9] which has a sum of 23.
20 * 
21 * <strong class="example">Example 3:
22 * 
23 * Input: nums = [1,2,1,2,1,2,1], m = 3, k = 3
24 * Output: 0
25 * Explanation: There are no subarrays of size k = 3 that contain at least m = 3 distinct elements in the given array [1,2,1,2,1,2,1]. Therefore, no almost unique subarrays exist, and the maximum sum is 0.
26 * 
27 *  
28 * Constraints:
29 * 
30 * 	1 <= nums.length <= 2 * 10^4
31 * 	1 <= m <= k <= nums.length
32 * 	1 <= nums[i] <= 10^9
33 * 
34 */
35pub struct Solution {}
36
37// problem: https://leetcode.com/problems/maximum-sum-of-almost-unique-subarray/
38// discuss: https://leetcode.com/problems/maximum-sum-of-almost-unique-subarray/discuss/?currentPage=1&orderBy=most_votes&query=
39
40// submission codes start here
41
42impl Solution {
43    pub fn max_sum(nums: Vec<i32>, m: i32, k: i32) -> i64 {
44        
45    }
46}
47
48// submission codes end
49
50#[cfg(test)]
51mod tests {
52    use super::*;
53
54    #[test]
55    fn test_2841() {
56    }
57}
58