def zunda():
    global cnt, f
    cnt += 1
    f = 1

N = int(input())
A = list(map(int, input().split()))
cnt = 0
f = 0
for i in range(N):
    if i == 0:
        zunda()
    elif f == 0:
        zunda()
    elif A[i - 1] == A[i]:
        zunda()
    else:
        f = 0
print(cnt)