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n = int(input())

ciag = input().split()

for i in range(n):
    ciag[i] = int(ciag[i])

wyn = 0
nr = 1

kier = None

while nr < n:
    if ciag[nr] < ciag[nr-1]:
        kier = 1
        break
    if ciag[nr] > ciag[nr-1]:
        kier = -1
        break
    nr += 2
    wyn += 1

if kier != None:
    nr += 1

    while nr < n:
        if kier == 1:
            if ciag[nr] > ciag[nr-1]:
                kier = -1
                nr += 1
            else:
                wyn += 1
                nr += 2
        else:
            if ciag[nr] < ciag[nr-1]:
                kier = 1
                nr += 1
            else:
                nr += 2
                wyn += 1
print(wyn)