Submission #1137532

#	Time	Username	Problem	Language	Result	Execution time	Memory
1137532		viwlesxq	Boxes with souvenirs (IOI15_boxes)	C++20	20 / 100	0 ms	328 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>

using namespace std;

long long delivery(int n, int k, int l, int p[]) {
    auto dist = [&](int x, int y) {
        if (x > y) swap(x, y);
        return min(y - x, x + (l - y) % l);
    };

    long long res = 0;

    deque<int> q;
    for (int i = 0; i < n; ++i) {
        q.push_back(p[i]);
    }

    int pos = 0;

    while (!q.empty()) {
        int f, c = k;
        if (dist(pos, q.front()) < dist(pos, q.back())) f = 1;
        else f = 0;

        while (!q.empty() && c--) {
            if (f) {
                if (q.front() - pos < pos + (l - q.back()) % l) {
                    res += q.front() - pos;
                    pos = q.front();
                    q.pop_front();
                } else {
                    res += pos + (l - q.back()) % l;
                    pos = q.back();
                    q.pop_back();
                    f = 0, c = k - 1;
                }
            } else {
                if (((pos ? pos : l) - q.back()) % l < (l - pos) % l + q.front()) {
                    res += ((pos ? pos : l) - q.back()) % l;
                    pos = q.back();
                    q.pop_back();
                } else {
                    res += (l - pos) % l + q.front();
                    pos = q.front();
                    q.pop_front();
                    f = 1, c = k - 1;
                }
            }
        }

        res += dist(pos, 0);
        pos = 0;
    }

    return res;
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30