Submission #395438

#	Time	Username	Problem	Language	Result	Execution time	Memory
395438		luisgalan	Arranging Shoes (IOI19_shoes)	C++14	50 / 100	1093 ms	3268 KiB

shoes

#include<bits/stdc++.h>
#include "shoes.h"
using namespace std;
typedef long long int ll;

ll count_swaps(vector<int> s) {
    int n = s.size();
    vector<bool> taken(n);

    ll ans = 0;
    for (int i = 0; i < n; i++) {
        if (taken[i]) continue;
        taken[i] = true;
        for (int j = i; j < n; j++) {
            if (taken[j]) continue;
            ans++;
            if (s[i] == -s[j]) {
                taken[j] = true;
                if (s[i] < 0) {
                    ans--;
                }
                break;
            }
        }
    }
    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