Untitled

class Solution {
public:
    int numOfSubarrays(vector<int>& arr, int k, int threshold) {
        
    int i=0,j=0,sum=0,count=0;
    while(j<arr.size())
    {
        if( (j-i+1) == k )
        {
            if( (sum/2) >= threshold)
            {
                count++;
            }
            sum -= arr[i];
            i++;
            j++;
        }
        else
        {
            j++;
        }
        sum += arr[j];
    }
    return count;
        
    }
};