Submission #1198766

#	Time	Username	Problem	Language	Result	Execution time	Memory
1198766		eliiasg	Boxes with souvenirs (IOI15_boxes)	C++20	100 / 100	316 ms	78688 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>
using namespace std;
#define LL long long

LL del(int N, int K, int L, vector<int> *p, int l, int r);
LL delivery(int N, int K, int L, int p[])
{
    vector<int> ps(N);
    for (size_t i = 0; i < N; i++)
    {
        ps[i] = p[i];
    }

    int m = K / 2;
    int r = 0;
    while (ps[r] <= L / 2 && r < N)
        r += 1;
    int l = r - 1;
    LL score = del(N, K, L, &ps, l, r);
    l -= K;
    for (int i = 0; i < K; i++)
    {
        ++l;
        ++r;
        score = min(score, del(N, K, L, &ps, l, r) + L);
    }
    return score;
}

LL del(int N, int K, int L, vector<int> *p, int l, int r)
{
    LL s = 0;
    while (l >= 0)
    {
        s += (*p)[l] * 2;
        l -= K;
    }
    while (r < (*p).size())
    {
        s += (L - (*p)[r]) * 2;
        r += K;
    }
    return s;
}

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