Q5

from collections import defaultdict

for _ in range(int(input())):
    n=[int(x) for x in input().split()]
    nl=[int(x) for x in input().split()]
    Sum=n[1]
    prevSum = defaultdict(lambda : 0)
    res = 0
    currsum = 0
    for i in range(0, n[0]):
        currsum += nl[i]
        if currsum == Sum:
            res += 1
        if (currsum - Sum) in prevSum:
            res += prevSum[currsum - Sum]
        prevSum[currsum] += 1

    print(res)