Submission #298252

#	Time	Username	Problem	Language	Result	Execution time	Memory
298252		emil_physmath	Arranging Shoes (IOI19_shoes)	C++17	0 / 100	1 ms	256 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
using llong = long long;

long long count_swaps(vector<int> a) {
    int n = a.size();
    llong ans = 0;
    vector<int> l, r;
    for (int i = 0; i < n; ++i)
        if (a[i] < 0)
            l.push_back(i);
        else
            r.push_back(i);
    for (int i = 0; i < n / 2; ++i)
    {
        ans += l[i] - 2 * i + (r[i] < l[i]);
        ans += r[i] - 2 * i;
    }
    return ans;
}

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