Submission #1215799

#	Time	Username	Problem	Language	Result	Execution time	Memory
1215799		SzBence	Arranging Shoes (IOI19_shoes)	C++20	10 / 100	1 ms	328 KiB

shoes

#include "shoes.h"

#include<bits/stdc++.h>
using namespace std;

long long count_swaps(std::vector<int> s) {
	vector<int>v;

	int n = s.size();
	for(int i =0;i < n;i++){
		if(s[i]>0)v.push_back(s[i]);
	}
	sort(v.begin(),v.end());
	int ln =INT_MAX;
	do{
		auto d = s;
		int sum = 0;
		for(int i =0; i< n/2;i++){
			int j =i*2;
			while(j < n && d[j] != -v[i])j++;
			while(j-- != i*2) {
				swap(d[j],d[j+1]);
				sum++;
			}
			++++j;
			while(j < n && d[j] != v[i])j++;
			while(j-- != i*2+1) {
				swap(d[j],d[j+1]);
			}
		}
		ln = min(ln,sum);
	}while(next_permutation(v.begin(),v.end()));
	return ln;
}

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