Submission #219011

#	Time	Username	Problem	Language	Result	Execution time	Memory
219011		sidiq_ha	Arranging Shoes (IOI19_shoes)	C++14	0 / 100	1103 ms	81912 KiB

shoes

#include<bits/stdc++.h>
#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);
queue<int> kanan[121212];
int BIT[121212];

void update(int p) {
	for (int i = p; i <= 1e5; i += (i & (-i))) BIT[i]++;
}

int query(int p) {
	int cnt = 0;
	for (int i = p; i > 0; i -= (i & (-i))) {
		cnt += BIT[i];
	}
	return cnt;
}

long long count_swaps(vector<int> s) {
	int n = s.size();
	priority_queue<pair<int, int> > pq;
	for (int i = 0; i < n; i++) {
		int x;
		x = s[i];
		if (x < 0) {
			pq.push(mp(-i, -x));
		} else {
			kanan[x].push(i);
		}
	}
	LL ans = 0;
	int idx = 1;
	while (!pq.empty()) {
		int pos = -pq.top().fi;
		int val = pq.top().se;
		pq.pop();
		pos += (idx - 1) - query(pos);
		ans += (pos - idx);
		update(pos);
		pos = kanan[val].front();
		kanan[val].pop();
		pos += (idx - query(pos));
		ans += (pos - idx - 1);
		update(pos);
		idx += 2;
	}
	return ans;
}

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