import java.util.*;
 
class Ideone
{
    public static void main (String[] args) throws java.lang.Exception
    {
        Scanner sc = new Scanner(System.in);
 
        int n = sc.nextInt();
        int k = sc.nextInt();
 
        int[] nums = new int[n];
        for(int i = 0; i < n; i++){
            nums[i] = sc.nextInt();
        }
 
        int[] p = new int[n+1];
        for(int i = 1; i <= n; i++){
            p[i] = p[i-1] + nums[i-1];
        }
 
        HashMap<Integer, Integer> mp = new HashMap<>();
 
        mp.put(-k, 1);  
 
        int count = 0;
 
        for(int j = 1; j <= n; j++){
            int rhs = p[j] - k*j - k;
 
            count += mp.getOrDefault(rhs, 0);
 
            int lhs = p[j] - k*(j + 1);
            mp.put(lhs, mp.getOrDefault(lhs, 0) + 1);
        }
 
        System.out.println(count);
    }
}
 

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5 2
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