제출 #219177

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
219177		sidiq_ha	Arranging Shoes (IOI19_shoes)	C++14	100 / 100	375 ms	176896 KiB

shoes

#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include "shoes.h"
#define pb push_back
#define fi first
#define se second
#define mp make_pair
#define all(v) v.begin(), v.end()

using namespace std;
typedef long long LL;
const LL MOD = 1e9 + 7;
const double PI = 2 * acos(0);
using namespace __gnu_pbds;
typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> new_data_set;
//order_of_key(x) = number of elements stricly smaller than x
//find_by_order(x) = return x-th largest element
bool flag[323232];
queue<int> kiri[121212], kanan[121212];

long long count_swaps(vector<int> s) {
	new_data_set tmp;
	int n = s.size();
	LL ans2 = 0;
	vector<int> ans;
	for (int i = 0; i < n; i++) {
		if (s[i] < 0) kiri[-s[i]].push(i);
		else kanan[s[i]].push(i);
	}
	for (int i = 0; i < n; i++) {
		if (!flag[i]) {
			if (s[i] < 0) {
				int x = -s[i];
				ans.pb(i);
				flag[i] = 1;
				kiri[x].pop();
				int xx = kanan[x].front();
				ans.pb(xx);
				flag[xx] = 1;
				kanan[x].pop();
			} else {
				int x = s[i];
				ans.pb(i);
				flag[i] = 1;
				kanan[x].pop();
				int xx = kiri[x].front();
				ans.pb(xx);
				flag[xx] = 1;
				kiri[x].pop();
			}
		}
	}
	for (int i = 0; i < n; i += 2) {
		if (s[ans[i]] > 0) swap(ans[i], ans[i + 1]);
	}
	for (int i = 0; i < n; i++) {
		int cnt = tmp.order_of_key(ans[i]);
		cnt = i - cnt;
		ans2 += (ans[i] + cnt - i);
		tmp.insert(ans[i]);
	}
	return ans2;
}

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