Submission #302474

#	Time	Username	Problem	Language	Result	Execution time	Memory
302474		MasterTaster	Arranging Shoes (IOI19_shoes)	C++14	30 / 100	32 ms	2944 KiB

shoes

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

#define ll long long

using namespace std;

long long count_swaps(std::vector<int> s) {

    int n=s.size();
    if (n==2)
    {
        if (s[0]<0) return 0;
        else return 1;
    }

    bool isti=true;
    for (int i=1; i<n; i++)
        if (abs(s[i])!=abs(s[i-1])) { isti=false; break; }

    if (isti)
    {
        int gde=1;
        ll ress=0;
        for (int i=0; i<n; i++)
        {
            if (s[i]>0)
            {
                ress+=abs(i-gde);
                gde+=2;
            }
        }
        return ress;
    }
    else return (ll)(n*n/4);
}

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