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- #include <iostream>
- #include <vector>
- using namespace std;
- int a,b,m;
- vector<int> v,dp;
- int main(){
- v.push_back(1000000000);
- dp.push_back(0);
- cin >> a;
- while(a--){
- m=0;
- cin >> b;
- v.push_back(b);
- for(int i=1;i<=dp.size();i++){
- if(v[dp.size()]<=v[dp.size()-i]&&(!m||i*i+dp[dp.size()-i]<m))m=i*i+dp[dp.size()-i];
- }
- dp.push_back(m);
- }
- m=0;
- v.push_back(0);
- for(int i=1;i<=dp.size();i++){
- if(!m||i*i+dp[dp.size()-i]<m)m=i*i+dp[dp.size()-i];
- }
- cout << m;
- }
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