#21410: 我找不到問題!
howard20060216@gmail.com
(Howard)
#include<iostream>
using namespace std;
int main(void){
ios::sync_with_stdio(false);
cin.tie(NULL);
int n, arr[10002];
int highest, sum;
while(cin>>n){
highest=-1, sum=0;
for(int i=0;i<n;i++)
cin>>arr[i];
for(int i=1;i<n-1;){
if(arr[i] > arr[i+1]){
sum++;
while(arr[i] >= arr[i+1])i++;
}
else
i++;
}
cout<<sum<<endl;
}
return 0;
}