#include<iostream>
#include<cstdio>
#include<cstring>
#include<algorithm>
#include<cmath>
using namespace std;
const int N=1000;
int main()
{
int n,a[N],m=0,i;
cin>>n;
for(i=0;i<n;i++){
cin>>a[i];
}
for(i=1;i<n-1;i++){
if(a[i]>a[i-1]&&a[i]>a[i+1]){
m++;
}
if(a[i]<a[i-1]&&a[i]<a[i+1]){
m++;
}
}
cout<<m;
return 0;
}
CCF认证 201604-1:折点计数(C++)
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转载自blog.csdn.net/weixin_44652687/article/details/104717441
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