Submission #563586

#	Time	Username	Problem	Language	Result	Execution time	Memory
563586		hoanghq2004	Boxes with souvenirs (IOI15_boxes)	C++14	100 / 100	544 ms	262088 KiB

boxes

#include <bits/stdc++.h>
#pragma GCC optimize ("O3")
#pragma GCC optimize ("unroll-loops")
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include "boxes.h"

using namespace __gnu_pbds;
using namespace std;

template <typename T>
using ordered_set = tree <T, null_type, less <T>, rb_tree_tag, tree_order_statistics_node_update>;

const int N = 1e7 + 10;

long long f[N], g[N];
int p[N];

long long delivery(int n, int k, int l, int P[]) {
    for (int i = 0; i < n; ++i) p[i + 1] = P[i];
    for (int i = 1; i <= n; ++i) f[i] = f[max(0, i - k)] + 2 * p[i];
    for (int i = n; i >= 1; --i) g[i] = g[min(n + 1, i + k)] + 2 * (l - p[i]);
    long long ans = 1e18;
    k = min(k, n);
    for (int i = 0; i <= n; ++i)
        ans = min(ans, f[i] + g[i + 1]);
    for (int i = 1; i <= n; ++i) {
        int j = min(i + k, n + 1);
        ans = min(ans, f[i - 1] + g[j] + l);
    }
    return ans;
}


//
//int main() {
//    freopen("test.inp", "r", stdin);
//    ios :: sync_with_stdio(0); cin.tie(0);
//    int n, k, l;
//    cin >> n >> k >> l;
//    int p[n];
//    for (int i = 0; i < n; ++i) cin >> p[i];
//    cout << delivery(n, k, l, p);
//}

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