The output of the subset sum problem is incorrect.

Question

Can someone identify what is causing all test cases to return 'No' in my implementation of the subset sum problem?

def isSubls(l, n, s):

    if s == 0:
        return 'Yes'
    if n == 0 and s != 0:
        return False
    if l[n - 1] > s:
        return isSubls(l, n - 1, s)

    return isSubls(l, n-1, s) or isSubls(l, n-1, s-l[n-1])

def run():

    for _ in range(int(input())):

        n, m = map(int, input().split())
        l = []

        for i in range(n):
            l.append(int(input()))

        print(isSubls(l, n, m))

run()