Today I have done leetcode's July LeetCoding Challenge with cpp.

July LeetCoding Challenge 22

Description

Maximum Erasure Value

You are given an array of positive integers nums and want to erase a subarray containing unique elements. The score you get by erasing the subarray is equal to the sum of its elements.

Return the maximum score you can get by erasing exactly one subarray.

An array b is called to be a subarray of a if it forms a contiguous subsequence of a, that is, if it is equal to a[l],a[l+1],...,a[r] for some (l,r).

Example 1:

Input: nums = [4,2,4,5,6]
Output: 17
Explanation: The optimal subarray here is [2,4,5,6].

Example 2:

Input: nums = [5,2,1,2,5,2,1,2,5]
Output: 8
Explanation: The optimal subarray here is [5,2,1] or [1,2,5].

Constraints:

• 1 <= nums.length <= 105
• 1 <= nums[i] <= 104

Solution

class Solution {
public:
  int maximumUniqueSubarray(vector<int>& nums) {
    bool vis[10001] = {};
    int sum = 0;
    int start = 0;
    int len = nums.size();
    int answer = 0;
    for(int end = 0; end < len; ++end) {
      while(vis[nums[end]]) {
        vis[nums[start]] = false;
        sum -= nums[start];
        start += 1;
      }
      vis[nums[end]] = true;
      sum += nums[end];
      answer = max(sum, answer);
    }
    return answer;
  }
};

// Accepted
// 62/62 cases passed (338 ms)
// Your runtime beats 77.77 % of cpp submissions
// Your memory usage beats 99.27 % of cpp submissions (89.1 MB)