#include <bits/stdc++.h>
#include "shoes.h"
long long count_swaps(std::vector<int> s)
{
int N = s.size(), p = 0, n = 0;
for (int i = 0; i < N; i += 2)
{
if (s[i] > 0)
{
p++;
}
else if (s[i + 1] < 0)
{
n++;
}
}
return std::max(p, n);
}
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