Submission #919995

#	Time	Username	Problem	Language	Result	Execution time	Memory
919995		tanprodium	Arranging Shoes (IOI19_shoes)	C++14	50 / 100	1043 ms	3164 KiB

shoes

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

using namespace std;

// random
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

// templates
template<class X, class Y>
    bool maximize(X &x, const Y &y) {
        if (y > x) {
            x = y;
            return (true);
        } else return (false);
    }

template<class X, class Y>
    bool minimize(X &x, const Y &y) {
        if (y < x) {
            x = y;
            return (true);
        } else return (false);
    }

// define
#define fi    first
#define se    second

#define pub   push_back
#define pob   pop_back
#define puf   push_front
#define pof   pop_front
#define eb    emplace_back
#define upb   upper_bound
#define lwb   lower_bound

#define left  VAN
#define right TAN

#define all(a) (a).begin(),(a).end()
#define rall(a) (a).begin(),(a).end()
#define sort_and_unique(a) sort(all(a));(a).resize(unique(all(a))-a.begin())
#define max_ max_element
#define min_ min_element

// another define
using ll  = long long;
using ld  = long double;
using pii = pair<int, int>;
using pil = pair<int, ll>;
using pli = pair<ll, int>;
using pll = pair<ll, ll>;

// limit
const int oo = 2e9;

// function
void yesno(bool x) {
    cout << (x ? "YES\n" : "NO\n");
}

#include "shoes.h"

ll count_swaps(vector<int> a) {
    int n = (int)a.size() / 2;
    ll ans = 0;
    for (int i = 0; i < 2 * n; i += 2) {
        if (a[i] < 0) {
            for (int j = i + 1; j < 2 * n; j++)
            if (a[j] == -a[i]) {
                ans += j - i - 1;
                for (int k = j - 1; k >= i + 1; k--)
                    swap(a[k],  a[k + 1]);
                break;
            }
        } else {
            for (int j = i + 1; j < 2 * n; j++)
            if (a[j] == -a[i]) {
                ans += j - i;
                for (int k = j - 1; k >= i; k--)
                    swap(a[k], a[k + 1]);
                break;
            }
        }
    }
    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