HORSE C++

#include <bits/stdc++.h>
using namespace std;

int n,x,i,s;
int a[1000000];
void nhap()
{
    scanf("%d",&n);
    //cin>>n;
    for (i=1;i<=n;i++) 
        //cin>>a[i];
        scanf("%d",&a[i]);
}
void xuli()
{
    x=a[1];s=0;
    for(int i=2;i<=n;i++)
    {
           s=s+x;
          if (a[i]< x) x=a[i];
        
    }
    cout<<s;
}

int main()
{
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    freopen("horse.inp","r",stdin);
    freopen("horse.out","w",stdout);
    nhap();
    xuli();
}