N,M =map(int,raw_input().split())
C = list(map(int,raw_input().split()))
D,cnt =[],0
D = C[0]-M
if D <= 0:
    cnt += 1
for i in range(1,N):
    D = C[1]-abs(D)
    if D <= 0:
        cnt += 1
    else:
        break
print cnt