Submission #1325492

#	Time	Username	Problem	Language	Result	Execution time	Memory
1325492		x_a	Arranging Shoes (IOI19_shoes)	C++20	10 / 100	1094 ms	1948 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>

using namespace std;

long long count_swaps(vector<int> s) {
	int n = s.size();
	int id = 0, ans = 0;
	while(id < n){
		if(abs(s[id]) == abs(s[id + 1])){
			if(s[id] > 0) ans ++;
			id += 2;
			continue;
		}
		int x = id + 1;
		for(int i = id + 1; i < n; i ++){
			if(s[id] != s[i] && abs(s[id]) == abs(s[i])) {
				x = i;
				break;
			}
		}
		ans += (x - id - 1);
		for(int i = x - 1; i >= id + 1; i --){
			swap(s[i + 1], s[i]);
		}
	}
	return ans;
}

// int main(){
// 	int n; cin >> n;
// 	vector<int> s;
// 	for(int i = 1, k; i <= 2 * n; i ++){
// 		cin >> k;
// 		s.push_back(k);
// 	}
// 	cout << count_swaps(vector<int> s) << endl;
// }

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