Submission #1082741

#	Time	Username	Problem	Language	Result	Execution time	Memory
1082741		nickolasarapidis	Arranging Shoes (IOI19_shoes)	C++17	10 / 100	1 ms	348 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
 
#define ll long long
 
ll count_swaps(vector<int> S){
	int N = S.size();
 
	ll ans = 0;
 
	map<int, ll> m;
	map<int, vector<int>> id;

	for(int i = 0; i < N; i++){
		if(m[-S[i]] > 0){
			if(S[i] < 0){
				m[-S[i]]--;
		 		ans += i - id[-S[i]].back();
		 		id[-S[i]].pop_back();
			}
			else{
				m[-S[i]]--;
		 		ans += i - id[-S[i]].back() - 1;
		 		id[-S[i]].pop_back();
			}
		}
		else{
			m[S[i]]++;
			id[S[i]].push_back(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