Submission #426613

#	Time	Username	Problem	Language	Result	Execution time	Memory
426613		oleh1421	Building Bridges (CEOI17_building)	C++17	30 / 100	3055 ms	4460 KiB

building

#include<bits/stdc++.h>
typedef long long ll;
using namespace std;
const int N=100010;
const ll mod=1000000007;
const ll inf=1e15;
ll h[N],w[N];
ll dp[N];
ll a[N],b[N];
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int n;cin>>n;
    for (int i=1;i<=n;i++) cin>>h[i];
    for (int i=1;i<=n;i++) cin>>w[i],w[i]+=w[i-1];
    dp[1]=0;
    a[1]=h[1]*h[1]-w[1]+dp[1];
    b[1]=-2*h[1];
    for (int i=2;i<=n;i++){
        dp[i]=inf;
        for (int j=1;j<i;j++){
            dp[i]=min(dp[i],a[j]+b[j]*h[i]);
        }
        dp[i]+=h[i]*h[i]+w[i-1];
        a[i]=h[i]*h[i]+dp[i]-w[i];
        b[i]=-2*h[i];
    }
    cout<<dp[n]<<endl;
    return 0;
}
/**
6
3 8 7 1 6 6
0 -1 9 1 2 0
**/

• Subtask 1: 30 / 30
• Subtask 2: 0 / 30
• Subtask 3: 0 / 40