#include <bits/stdc++.h>
#define y1 sat
#define dl double
#define int long long
#define ff first
#define ss second
// #define sz size
#define pb push_back
#define wrans cout << -1
#define neutral cout << 0
using namespace std;
const int N=1e6+1;
const int M=111;
const int MOD=1e9+7;
const double long E=2.718281828459045;
const double long pi=3.14159265359;
const long long INF=1e18;
int a[N];
// ╔╗╔╗╔╗╔╗╔╗╔╗╔═╗
// ║║║║║║║║║║║║╚╗║
// ║╚╝║║║║║║╚╝║╔╝║
// ║╔╗║║║║║║╔╗║║╔╝
// ║║║║║╚╝║║║║║╔╗─
// ╚╝╚╝╚══╝╚╝╚╝╚╝─
// int binpow(int a,int b){
// if(b==0) return 1;
// if(b%2 == 0){
// int x=binpow(a,b/2);
// return (x*x)%MOD;
// }
// else return (a*binpow(a,b-1))%MOD;
// }
void solve(){
int n;
cin >> n;
int cnt=0;
for(int i = 1 ; i <= n ;i++){
cin >> a[i];
}
a[0]=13234243;
for(int i = 1 ; i <= n ; i++){
if(a[i]<a[i-1]){
cnt++;
}
}
cout << cnt;
}
signed main(){
ios_base::sync_with_stdio(false); cin.tie(nullptr);
// cout.tie(0);
// for(int i = 2 ; i <= INF ; i++){
// if(prime[i]==0){
// for(int j = 2 ; i*j<=INF ; j++){
// prime[i*j]=1;
// }
// }
// }
// fact();
int test=1;
// cin >> test;
while(test--){
solve();
}
return 0;
}
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