Submission #1204086

#	Time	Username	Problem	Language	Result	Execution time	Memory
1204086		tamyte	Arranging Shoes (IOI19_shoes)	C++20	10 / 100	0 ms	328 KiB

shoes

#include "shoes.h"
#include <vector>
#include <iostream>
using namespace std;
using ll = long long;
/*
2
2 1 -1 -2
3
-2 2 2 -2 -2 2

*/
long long count_swaps(std::vector<int> s) {
	ll res = 0;
	int N = s.size();
	for (int i = 0; i < N; i += 2) {
		int want = -s[i];
		for (int j = i + 1; j < N; ++j) {
			if (s[j] == want) {
				int k = j;
				// cerr << k << " =  " << want << endl;
				while (s[k - 1] != -want) {
					swap(s[k - 1], s[k]);
					k--;
					res++;
				}
				if (s[k - 1] > s[k]) {
					swap(s[k - 1], s[k]);
					res++;
				}
				break;
			}
		}
	}
	/*for (auto& u : s) {
		cout << u << " ";
	}
	cout << endl;*/
	return res;
}

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