CSES Problem Set

# Subarray Sums I

CSES - Subarray Sums ICSES - Subarray Sums I

 Time limit: 1.00 s Memory limit: 512 MB

Given an array of $n$ positive integers, your task is to count the number of subarrays having sum $x$.

Input

The first input line has two integers $n$ and $x$: the size of the array and the target sum $x$.

The next line has $n$ integers $a_1,a_2,\dots,a_n$: the contents of the array.

Output

Print one integer: the required number of subarrays.

Constraints
• $1 \le n \le 2 \cdot 10^5$
• $1 \le x,a_i \le 10^9$
Example

Input:
5 7 2 4 1 2 7

Output:
3