import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
 
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
 
        int n = scanner.nextInt();
        long k = scanner.nextLong();
        long sum = 0, count = 0;
 
        Map<Long, Long> prefixSums = new HashMap<>();
        prefixSums.put(0L, 1L);
 
        for (int i = 0; i < n; i++) {
            sum += scanner.nextLong();
            count += prefixSums.getOrDefault(sum - k, 0L);
            prefixSums.put(sum, prefixSums.getOrDefault(sum, 0L) + 1);
        }
 
        System.out.println(count);
    }
}
 

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Mwo1CjUgLTUgNSA=

3
5
5 -5 5