Submission #318463

#	Time	Username	Problem	Language	Result	Execution time	Memory
318463		Wesley_Wang	Arranging Shoes (IOI19_shoes)	C++14	10 / 100	1 ms	492 KiB

shoes

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

using namespace std;

long long count_swaps(std::vector<int> s) {
	int n = s.size();
	int p[n / 2];
	for (int i = 0; i < n/2; i++)
        p[i] = -1;
	for (int i = 0; i < n; i++)
    {
        int k = abs(s[i]) - 1;
        if (p[k] == -1)
            p[k] = i;
        else
            p[k] = s[i] > 0? i - p[k] - 1: i - p[k];
    }
    int sum = 0;
    for (int i = 0; i < n/2; i++)
        sum += p[i];
    return sum;
}

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