N = int(input())
A = list(map(int, input().split()))

flg = 1
ans = 1

for i in range(1,N):
    if flg:
        if A[i-1] == A[i]:
            ans += 1
        else:
            flg = 0
    else:
        ans += 1
        flg = 1

print(ans)