Submission #727631

#	Time	Username	Problem	Language	Result	Execution time	Memory
727631		hoainiem	Boxes with souvenirs (IOI15_boxes)	C++14	10 / 100	2 ms	340 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>
#define nmax 10000008
const long long inf = 1e18;
using namespace std;
int n, k, l, pl, pr, pmid, cnt = 0;
long long res, ans;
struct container{
    long long cur, sz, sum[nmax];
    void insert(int x){
        sz++;
        cur--;
        if (cur < 0)
            cur += k;
        sum[cur] += x;
    }
    void erase(int x){
        sum[cur] -= x;
        cur++;
        if (cur >= k)
            cur -= k;
        sz--;
    }
    long long cost(){
        return sum[cur] * 2;
    }
}u, v;
vector<int>vtu, vtv;
stack<int>s;
long long delivery(int N, int K, int L, int p[]) {
    ans = inf;
    cnt = n = N;
    k = K;
    l = L;
    if (l % 2 == 0)
        pmid = l / 2;
    else
        pmid = -1;
    for (int i = 0; i < n && p[i] < l - p[i]; i++){
        u.insert(p[i]);
        vtu.push_back(p[i]);
        cnt--;
    }
    for (int i = n - 1; i >= 0 && p[i] > l - p[i]; i--){
        v.insert(l - p[i]);
        vtv.push_back(l - p[i]);
        cnt--;
    }
    if (pl - pr == 1)
        return u.cost() + v.cost();
    int r = (k - (cnt % k)) % k;
    res = 1LL * n * (cnt / k);
    if (!r)
        return res + u.cost() + v.cost();
    for (int i = 1; i <= r; i++){
        u.erase(vtu.back());
        s.push(vtu.back());
        vtu.pop_back();
    }
    ans = min(ans, res + u.cost() + v.cost());
    for (int i = 1; i <= r; i++){
        u.insert(s.top());
        s.pop();
        v.erase(vtv.back());
        ans = min(ans, res + u.cost() + v.cost());
    }
    return res;
}

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