Submission #222862

#	Time	Username	Problem	Language	Result	Execution time	Memory
222862		MrDomino	Arranging Shoes (IOI19_shoes)	C++14	25 / 100	45 ms	4504 KiB

shoes

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

using namespace std;

typedef long long ll;

ll get_dist(vector<int> ord)
{
    ll sol = 0;
    for (int i = 0; i < (int) ord.size(); i++)
    {
        sol += abs(ord[i] - i);
    }
    return sol / 2;
}

long long count_swaps(vector<int> a)
{
    int n = (int) a.size() / 2;
    if (n == 1)
    {
        if (a[0] < 0)
        {
            return 0;
        }
        else
        {
            return 1;
        }
    }
    bool sim_sub = 1;
    for (int i = 0; i < n; i++)
    {
        sim_sub &= (a[i] < 0 && a[i + n] > 0 && a[i] == -a[i + n]);
    }
    if (sim_sub)
    {
        vector<int> ord;
        for (int i = 0; i < n; i++)
        {
            ord.push_back(i);
            ord.push_back(i + n);
        }
        return get_dist(ord);
    }
    return 0;
}

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