Submission #1215772

#	Time	Username	Problem	Language	Result	Execution time	Memory
1215772		gortomi	Arranging Shoes (IOI19_shoes)	C++20	30 / 100	1096 ms	3396 KiB

shoes

#include "shoes.h"
//#include "grader.cpp"
#include <bits/stdc++.h>
using namespace std;
long long count_swaps(std::vector<int> s) {
	int n = s.size() / 2;
	vector<int> si;
	for(int i = 0; i < 2 * n; i++)
	{
		if(s[i] >= 0) si.push_back(s[i]);
	}
	sort(si.begin(), si.end());
	int ans = 1e9;
	do
	{
		int cur = 0;
		vector<int> v;
		for(int i = 0; i < n; i++)
		{
			v.push_back(-si[i]);
			v.push_back(si[i]);
		}
		for(int i = 0; i < 2 * n; i++)
		{
			int fi = 0;
			for(int j = i; j < 2 * n; j++)
			{
				if(v[j] == s[i])
				{
					fi = j;
					break;
				}
			}
			for(int j = fi; j > i; j--)
			{
				swap(v[j], v[j - 1]);
				cur++;
			}
		}
		ans = min(ans, cur);
	} while (next_permutation(si.begin(), si.end()));
	return ans;
}

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