Submission #1221284

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
int read()
{
	int x=0,f=1;char ch=getchar();
	while (ch<'0'||ch>'9'){if (ch=='-') f=-1;ch=getchar();}
	while (ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}
	return x*f;
}
int n,a[100007],b[100007];
int main()
{
	int ans=0;
	n=read();
	for (int i=1;i<=n;i++) a[i]=read();
	for (int i=1;i<n;i++) if (a[i]>a[i+1]) b[i]=1; else if (a[i]<a[i+1]) b[i]=-1;
	int now=1;
	while (now<n)
	{
		int check=0;
		while (now<n&&b[now]*check>=0)
		{
			if (b[now]!=0) check=b[now];
			++now;
//cout << now << endl;
		}
		++ans;
		++now;
//cout << now << endl;
	}
	if (now==n) ++ans;
	cout << ans << endl;
	return 0;
}

Submission Info

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