2653. Sliding Subarray Beauty

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Mon Apr 24 2023 19:19:39 GMT+0000 (Coordinated Universal Time)

Saved by @Ayush_dabas07

class Solution {
    public int[] getSubarrayBeauty(int[] nums, int k, int x) {
        TreeMap<Integer,Integer> map = new TreeMap<>();
        int n = nums.length;
        //adding first k numbers
        for(int i = 0 ;i < k ;i++)
            map.put(nums[i] , map.getOrDefault(nums[i] , 0) + 1);
        
        //finding ans for first k ints
        int ans[]= new int[n - (k-1)];
        
        ans[0] = solve(map , x);
        
        for(int j= k , i = 0 ; j < n ; j++ , i++){
            //removing last and adding next elem;

            map.put(nums[i] , map.get(nums[i]) - 1);
            map.put(nums[j] ,map.getOrDefault(nums[j],0) + 1);
            
            if(map.get(nums[i]) == 0)
                map.remove(nums[i]);
            
            ans[j - k + 1] = solve(map , x);
        }
        return ans;
    }
    
    public int solve(TreeMap<Integer,Integer> map ,int x){
        //finding xth smallest element through treemap
        int count = 0; 
        for(int val : map.keySet()){
            count += map.get(val);
            if(count >= x){
                return val < 0 ? val : 0;
            }
        }
        return 0;
    }   
}

https://leetcode.com/contest/weekly-contest-342/problems/sliding-subarray-beauty/

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