from collections import Counter
import math
n = int(input())
xx = list(map(int,input().split()))
ll = [0]*n

c = 0
for i in range(n):
    if i == 0:
        c += 1
        ll[i] = 1
    else:
        if xx[i-1] == xx[i]:
            c += 1
            ll[i] = 1
        else:
            if ll[i-1] != 1:
                ll[i] = 1
                c += 1
print(c)