Submission #217001

#	Time	Username	Problem	Language	Result	Execution time	Memory
217001		thatprogrammer	Arranging Shoes (IOI19_shoes)	C++14	50 / 100	1097 ms	3200 KiB

shoes

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
long long count_swaps(vector<int> s) {
    int n = s.size() / 2;
    ll ans = 0;
    for (int i = 0; i < 2 * n; i += 2) {
        int j;
        for (j = i + 1; j < 2 * n; j++) {
            if (s[j] == -s[i]) break;
        }
        if (s[i] < 0)
            ans += j - i - 1;
        else
            ans += j - i;
        for (; j > i; j--) swap(s[j], s[j - 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