Submission #582817

#	Time	Username	Problem	Language	Result	Execution time	Memory
582817		600Mihnea	Building Bridges (CEOI17_building)	C++17	30 / 100	3071 ms	4796 KiB

building

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
const int N = (int) 1e5 + 7;
const ll INF = (ll) 1e18 + 7;
int n;
ll h[N];
ll sum[N];
ll dp[N];
pair<ll, ll> coef[N];

signed main() {
  ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

  cin >> n;
  for (int i = 1; i <= n; i++) {
    int x;
    cin >> x;
    h[i] = x;
  }
  for (int i = 1; i <= n; i++) {
    int x;
    cin >> x;
    sum[i] = sum[i - 1] + x;
  }

  dp[1] = 0;
  for (int i = 2; i <= n; i++) {
    dp[i] = INF;
  }

  for (int r = 2; r <= n; r++) {
    coef[r - 1] = {dp[r - 1] + h[r - 1] * h[r - 1] - sum[r - 1], - 2 * h[r - 1]};
    for (int l = 1; l < r; l++) {
      dp[r] = min(dp[r], coef[l].first + coef[l].second * h[r]);
    }
    dp[r] += h[r] * h[r] + sum[r - 1];
  }

  cout << dp[n] << "\n";

}

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