Submission #946998

#	Time	Username	Problem	Language	Result	Execution time	Memory
946998		Nelt	Boxes with souvenirs (IOI15_boxes)	C++17	100 / 100	504 ms	293892 KiB

boxes

#include <bits/stdc++.h>
#define ll long long
#define endl "\n"
using namespace std;
ll delivery(int n, int k, int L, int p[]) {
    ll ans = 1e18;
    ll pref[n], suf[n];
    for (ll i = 0; i < n; i++)
        pref[i] = (i - k < 0 ? 0 : pref[i - k]) + p[i];
    for (ll i = n - 1; i >= 0; i--)
        suf[i] = (i + k >= n ? 0 : suf[i + k]) + L - p[i];
    for (ll i = -1; i < n; i++)
        ans = min(ans, (i >= 0 ? pref[i] : 0) * 2 + (i + 1 < n ? suf[i + 1] : 0) * 2);
    for (ll i = 0; i < n; i++)
        ans = min(ans, (i - 1 >= 0 ? pref[i - 1] : 0) * 2 + L + (i + k < n ? suf[i + k] : 0) * 2);
    return ans;
}
// void solve()
// {
    
// }

// signed main()
// {
//     ios_base::sync_with_stdio(0);
//     cin.tie(0);
//     ll t = 1;
//     // precomp();
//     // cin >> t;
//     for (ll i = 1; i <= t; i++)
//         solve();
//     cerr << "\nTime elapsed: " << clock() * 1000.0 / CLOCKS_PER_SEC << " ms\n";
// }

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 15 / 15
• Subtask 4: 15 / 15
• Subtask 5: 20 / 20
• Subtask 6: 30 / 30