Submission #165387

#	Time	Username	Problem	Language	Result	Execution time	Memory
165387		andreiomd	Arranging Shoes (IOI19_shoes)	C++17	50 / 100	1082 ms	3292 KiB

shoes

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

using namespace std;

long long count_swaps (vector < int > S)
{
    int N = (int)S.size();
    long long ans = 0;

    for(int i = 0; i < N; i += 2)
    {
        int pos = 0;

        for(int j = i + 1; j < N; ++j)
            if(S[j] == -S[i])
            {
                pos = j;

                break;
            }

        ans += (pos - i - 1);

        for(int j = pos; j > i + 1; --j)
            swap(S[j], S[j - 1]);

        if(S[i] > 0)
            ++ans, swap(S[i], S[i + 1]);
    }

    return ans;
}

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