Submission #972123

#	Time	Username	Problem	Language	Result	Execution time	Memory
972123		efedmrlr	Building Bridges (CEOI17_building)	C++17	30 / 100	3044 ms	2652 KiB

building

#include <bits/stdc++.h>

#define lli long long int
#define ld long double
#define pb push_back
#define MP make_pair
#define REP(i, n) for(int i = 0; (i) < (n); (i)++)
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()

using namespace std;

void fastio() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
}

const int N = 1e5 + 5;
const lli INF = 1e17;
vector<int> h(N), w(N);
vector<lli> dp(N, INF), pr(N, 0);
void solve() {
    int n;
    cin >> n;
    for(int i = 1; i <= n; i++) {
        cin >> h[i];
    }
    for(int i = 1; i <= n; i++) {
        cin >> w[i];
    }
    for(int i = 1; i <= n; i++) {
        pr[i] = pr[i - 1] + w[i];
    }
    dp[1] = 0;
    for(int i = 2; i <= n; i++) {
        for(int j = 1; j < i; j++) {
            dp[i] = min(dp[i], -2 * h[j] * h[i] + (h[j] * h[j] - pr[j] + dp[j]) + pr[i - 1] + h[i] * h[i]);
        }
    }
    cout << dp[n] << "\n";
}

signed main() {
    fastio();
    solve();
}

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