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- #include<bits/stdc++.h>
- using namespace std;
- const int N=1e9+7;
- int a[3005],b[3005];
- int n;
- int main()
- {
- cin>>n;
- for(int i=1;i<=n;i++){
- cin>>a[i];
- }
- for(int i=1;i<=n;i++){
- cin>>b[i];
- }
- int ans=N;
- for(int i=1;i<=n;i++){
- int p=N,q=N;
- for(int j=1;j<i;j++){
- if(a[j]<a[i]){
- p=min(p,b[j]);
- }
- }
- for(int j=i+1;j<=n;j++){
- if(a[j]>a[i]){
- q=min(q,b[j]);
- }
- }
- ans=min(ans,p+q+b[i]);
- }
- if(ans==N){
- cout<<"-1"<<endl;
- }else{
- cout<<ans<<endl;
- }
- return 0;
- }
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