Submission #1186074

#	Time	Username	Problem	Language	Result	Execution time	Memory
1186074		GoBananas69	Arranging Shoes (IOI19_shoes)	C++20	10 / 100	1 ms	328 KiB

shoes

#include <algorithm>
#include <iostream>
#include <vector>
using namespace std;
typedef long long ll;

ll count_swaps(vector<int> s) {
    int n = s.size() / 2;
    if (n > 8) return 0;
    for (int i = 0; i < 2 * n; ++i) {
        if (s[i] < 0) {
            s[i] = abs(s[i]) * 2 - 1;
        } else {
            s[i] *= 2;
        }
    }
    int res = 0;
    while (!is_sorted(s.begin(), s.end())) {
        for (int i = 0; i < 2 * n - 1; ++i) {
            if (s[i] > s[i + 1]) {
                swap(s[i], s[i + 1]);
                ++res;
            }
        }
    }
    return res;
}

// signed main() {
//     cin.tie(0)->sync_with_stdio(0);
//     vector<vector<int>> tc{
//         {-1, 1, -2, 2},  // 0
//         {-1, -2, 1, 2},
//         {2, 1, -1, -2}  // 4
//     };
//     /*
//         {-1, 1, -2, 2}
//         {0, 1, 2, 3}
//     */
//     for (auto &v : tc) {
//         cout << count_swaps(v) << '\n';

//     }
// }

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