Submission #1221811

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Source Code Expand

n = int(input())
a_ = list(map(int, input().split(' ')))
a = [-1]
i = 0
while  i < n:
    if a[-1] != a_[i]:
        a.append(a_[i])
    i += 1
a = a[1:]

ret = 1

i = 0
while i < n-2:
    if (a[i] > a[i+1] and a[i+1] < a[i+2]) or (a[i] < a[i+1] and a[i+1] > a[i+2]):
        ret += 1
        i += 2
    else:
        i += 1
        
print(ret)

Submission Info

Judge Result