Submission #788088

#	Time	Username	Problem	Language	Result	Execution time	Memory
788088		aykhn	Arranging Shoes (IOI19_shoes)	C++14	50 / 100	1081 ms	4292 KiB

shoes

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

// author: aykhn

using namespace std;

typedef long long ll;

#define TC int t; cin >> t; while (t--) _();
#define OPT ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define all(v) v.begin(), v.end()
#define pii pair<int, int>
#define mpr make_pair
#define eb emplace_back
#define new int32_t
#define pb push_back
#define ts to_string
#define fi first
#define se second
#define ins insert
#define inf 0x3F3F3F3F
#define infll 0x3F3F3F3F3F3F3F3FLL
#define bpc __builtin_popcount

long long count_swaps(vector<int> V)
{
    vector<int> v;
    int n = V.size();
    v.pb(0);

    for (int i = 0; i < n; i++) v.pb(V[i]);

    ll ans = 0;


    for (int i = 1; i <= n; i += 2)
    {
        int ind = -1;
        for (int j = i + 1; j <= n; j++)
        {
            if (v[j] == -v[i])
            {
                ind = j;
                break;
            }
        }

        for (int k = ind - 1; k >= i + 1; k--)
        {
            ans++;
            swap(v[k], v[k + 1]);
        }
        if (v[i] > 0)
        {
            swap(v[i], v[i + 1]);
            ans++;
        }
    }
	return ans;
}

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