'''from sys import stdin, stdout


def main():
    NP = list(stdin.readline().split())
    N = int(NP[0])
    P = int(NP[1])
    smallest = N+1

    days = list(map(int, stdin.readline().split()))
    for i in range(0, len(days)):
        current = 0
        countr = 0
        for f in range(i, len(days)):
            countr += 1
            current += days[f]
            if current >= P:
                if countr < smallest:
                    smallest = countr
                break

    stdout.write(str(smallest))


main()
'''

from sys import stdin, stdout

def main():
    N, P = map(int, stdin.readline().split())
    days = list(map(int, stdin.readline().split()))

    smallest = N + 1
    current_sum = 0
    left_pointer = 0

    for right_pointer in range(N):
        current_sum += days[right_pointer]

        while current_sum >= P:
            smallest = min(smallest, right_pointer - left_pointer + 1)
            current_sum -= days[left_pointer]
            left_pointer += 1

    stdout.write(str(smallest))

main()