Submission #1004038

#	Time	Username	Problem	Language	Result	Execution time	Memory
1004038		Luvidi	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
#define pll pair<ll, ll>
#define pii pair<int, int>
#define fs first
#define sc second
#define pb push_back

long long count_swaps(std::vector<int> s) {
	int n=s.size()/2;
	vector<int> idx[2*n+1];	
	ll ans=0;
	for(int i=0;i<2*n;i++){
		if(idx[n-s[i]].empty())idx[n+s[i]].pb(i);
		else{
			int j=idx[n-s[i]].back();
			idx[n-s[i]].pop_back();
			ans+=(ll)(i-j-1);
			if(s[i]<0)ans++;
		}
	}
	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