Submission #280375

#	Time	Username	Problem	Language	Result	Execution time	Memory
280375		CaroLinda	Arranging Shoes (IOI19_shoes)	C++14	10 / 100	1 ms	288 KiB

shoes

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

#define sz(x) (int)x.size()
#define mkt make_tuple
#define lp(i,a,b) for(int i = a ; i < b ; i++ )
#define ff first
#define ss second
#define eb emplace_back
#define ll long long
#define mk make_pair
#define pii pair<int,int>
#define debug printf
#define all(x) x.begin(),x.end()

const int MAXN = 1e5+10 ;

using namespace std ;

int freq[MAXN][2] ;

/*
6
-2 2 -2 2 -2 2
*/

long long count_swaps(vector<int> v)
{

    ll ans = 0LL ;
    for(int i = 0 ; i < sz(v) ; i++ )
    {

        //debug("%d %d\n" , freq[ abs(v[i]) ][0] , freq[ abs(v[i]) ][1] ) ;

        if( v[i] < 0 )
        {
            if( freq[ -v[i] ][1] > 0 ) freq[ -v[i] ][1] -- , ans += (ll)i ;
            else freq[ -v[i] ][0]++ , ans -= (ll)i , ans-- ;

        }

        else
        {
            if( freq[ v[i] ][0] > 0) freq[ v[i] ][0]-- , ans += (ll)i ;
            else freq[v[i]][1]++ , ans -= (ll)i ;
        }

    }

    return ans ;

}

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