Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold.cpp

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