Submission #623951

#	Time	Username	Problem	Language	Result	Execution time	Memory
623951		rubdary	Arranging Shoes (IOI19_shoes)	C++14	10 / 100	1 ms	296 KiB

shoes

#include "shoes.h"
#include <iostream>
#include <vector>
#include <algorithm>
#include <utility>
#include <queue>
#define ll long long
using namespace std;

vector <pair <ll, ll>> n, p;
vector <queue <ll>> izq, derc;
vector <bool> vis;
ll ans = 0, x;

long long count_swaps(vector <int> s){
	int N = s.size()/2;
	for(ll i = 0; i < 2*N; i++){
		if(s[i] < 0) n.push_back({s[i] * (-1), i});
		if(s[i] > 0) p.push_back({s[i], i});
	}
	sort(n.begin(), n.end());
	sort(p.begin(), p.end());
	izq.resize(N+1);
	derc.resize(N+1);

	for(int i = 0; i < N; i++){
		izq[n[i].first].push(n[i].second);
		derc[p[i].first].push(p[i].second);
	}

	for(int i = 0; i < 2*N+1; i++) vis.push_back(false);

	for(int i = 0; i < 2*N; i++){
		if(vis[i] == true) continue;

		if(s[i] < 0){
			x = derc[s[i] * (-1)].front();
			derc[s[i] * (-1)].pop();
			izq[s[i] * (-1)].pop();
			ans += x - i - 1;
		}else{
			x = izq[s[i]].front();
			izq[s[i]].pop();
			derc[s[i]].pop();
			ans += x - i;
		}

		vis[x] = true; vis[i] = true;
	}
	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