#include<bits/stdc++.h>
using namespace std;
#define int long long
#define all(x) x.begin(),x.end()
const long long inf=1e18;
const int mod=1e9+7;
void solve(){
int n;
cin>>n;
vector<int>a(n),b(n);
for(int i=0;i<n;i++){
cin>>a[i];
}
for(int i=0;i<n;i++){
cin>>b[i];
}
int ans=0;
vector<int>dp(n);
for(int i=0;i<n;i++){
dp[i]=1;
}
for(int i=0;i<n;i++){
for(int j=i+1;j<n;j++){
if(a[j]>a[i]){
dp[j]+=dp[i];
}
}
}
for(int i=0;i<n;i++){
ans+=dp[i];
ans%=mod;
}
cout<<ans<<'\n';
}
signed main(){
int t=1;
#ifdef LOCAL
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
#endif
//cin>>t;
while(t--){
solve();
}
}
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