Submission #685055

#	Time	Username	Problem	Language	Result	Execution time	Memory
685055		turbat	Arranging Shoes (IOI19_shoes)	C++14	50 / 100	1084 ms	3112 KiB

shoes

#include "shoes.h"
using namespace std;

long long count_swaps(vector<int> s) {
    int n = s.size(), ans = 0;
    for (int i = 0; i < n; i += 2) {
        int pos = i;
        for (int j = i; j < n; j++)
            if (s[j] == -s[i]) {
                pos = j;
                break;
            }
        for (int j = pos; j > i + 1; j--) {
            if (s[j] == -s[i]) {
                swap(s[j], s[j - 1]);
                ans++;
            }
        }
        if (s[i] > 0) {
            swap(s[i], s[i + 1]);
            ans++;
        }
    }
    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