CCF python 分蛋糕

n, k = map(int, input().split())
list1 = list(map(int, input().split()))
num = 0
cake_num = 0
for i in range(n):
    if num == 0:
        cake_num += 1
    num = num + list1[i]
    if num >= k:
        num = 0
print(cake_num)