import sys

sys.setrecursionlimit(10 ** 6)
int1 = lambda x: int(x) - 1
p2D = lambda x: print(*x, sep="\n")
def II(): return int(sys.stdin.readline())
def MI(): return map(int, sys.stdin.readline().split())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
def SI(): return sys.stdin.readline()[:-1]

def main():
    n,s=MI()
    aa=LI()
    dp=[0]*(s+1)
    ans=0
    for a in aa:
        dp[0]+=1
        for i in range(s,a-1,-1):dp[i]+=dp[i-a]
        ans+=dp[s]
    print(ans)

main()