3rd que

/*
 _____ _             _              _           _
|_   _| |__   ___   / \   _ __  ___| |__  _   _| |
  | | | '_ \ / _ \ / _ \ | '_ \/ __| '_ \| | | | |
  | | | | | |  __// ___ \| | | \__ \ | | | |_| | |
  |_| |_| |_|\___/_/   \_\_| |_|___/_| |_|\__,_|_|

*/
#include<bits/stdc++.h>
#define ll          long long
#define rep(i,a,b)    for(ll int i=a;i<b;i++)

void solve()
{
    ll n;
    cin>>n;
    ll a[n],b[n];
    ll ans=0;
    rep(i,0,n)
    {
        cin>>a[i];
    }
    rep(i,1,n)
    cin>>b[i];
    rep(i,1,n)
    {
        if(a[i]>a[i-1])
            ans+=b[i];
    }
    cout<<ans;
    return;
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int TESTS=1;
//    cin>>TESTS;
    while(TESTS--)
    {
        solve();
    }
    time
    return 0;
}