Submission #147277

#	Time	Username	Problem	Language	Result	Execution time	Memory
147277		joylintp	Arranging Shoes (IOI19_shoes)	C++14	50 / 100	1071 ms	3220 KiB

shoes

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

using namespace std;

long long count_swaps(vector<int> s)
{
    long long n = s.size(), ret = 0;

    for (int i = 0; i < n; i++)
    {
        if (i % 2 == 0)
        {
            int j;
            for (j = i; s[j] != -abs(s[i]); j++);
            ret += j - i;

            int t = s[j];
            for (int k = j - 1; k >= i; k--)
                s[k + 1] = s[k];
            s[i] = t;
        }
        else
        {
            int j;
            for (j = i; s[j] != -s[i - 1]; j++);
            ret += j - i;

            int t = s[j];
            for (int k = j - 1; k >= i; k--)
                s[k + 1] = s[k];
            s[i] = t;
        }

        /*for (int i : s)
            cerr << setw(2) << i << ' ';
        cerr << '\n';*/
    }

	return ret;
}

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