Submission #282491

#	Time	Username	Problem	Language	Result	Execution time	Memory
282491		GREGOIRELC	Arranging Shoes (IOI19_shoes)	C++14	65 / 100	170 ms	144124 KiB

shoes

#include "shoes.h"
#include <cmath>
#include <iostream>
#include <queue>

using namespace std;

const int MAX_SHOES = 1e5 + 1;
const int T_MAX = 1 << 18;
const int MID = 1 << 17;

int lstType[MAX_SHOES];
long long segTree[T_MAX];
queue<int> enCours[MAX_SHOES];

void addVal(int noeud, int deb, int fin, int curDeb, int curFin)
{
	if(curDeb > fin || curFin < deb || curDeb > curFin)
	{
		return;
	}
	if(curDeb >= deb && curFin <= fin)
	{
		segTree[noeud]++;
		return;
	}
	int mid = (curDeb + curFin) / 2;
	addVal(noeud * 2, deb, fin, curDeb, mid);
	addVal(noeud * 2 + 1, deb, fin, mid + 1, curFin);
}

long long getVal(int pos)
{
	pos += MID;
	long long result = 0;
	while(pos > 0)
	{
		result += segTree[pos];
		pos /= 2;
	}
	return result;
}

long long count_swaps(vector<int> s)
{
	int N = (int)s.size();
	long long result = 0;
	for(int curShoes = 0; curShoes < N; curShoes++)
	{
		int taille = abs(s[curShoes]);
		int tp = abs(s[curShoes]) / s[curShoes];
		if(enCours[taille].empty())
		{
			enCours[taille].push(curShoes);
			lstType[taille] = tp;
		}
		else
		{
			if(lstType[taille] == tp)
			{
				enCours[taille].push(curShoes);
			}
			else
			{
				result += curShoes - enCours[taille].front();
				result -= getVal(enCours[taille].front());
				if(tp == 1)
				{
					result--;
				}
				addVal(1, enCours[taille].front(), curShoes, 0, MID - 1);
				enCours[taille].pop();
			}
		}
	}
	return result;
}

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