This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
// Ignut
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
ll count_swaps(vector<int> S) {
ll res = 0;
int n = S.size();
// for (int i = 0; i < n; i ++) {
// if (i % 2 == 0) {
// int j;
// for (j = i; j < n; j ++)
// if (S[j] < 0)
// break;
// while (j > i) {
// swap(S[j - 1], S[j]);
// j --;
// res ++;
// }
// }
// else {
// int j;
// for (j = i; j < n; j ++)
// if (S[j] == -S[i - 1])
// break;
// while (j > i) {
// swap(S[j - 1], S[j]);
// j --;
// res ++;
// }
// }
// }
for (int sz = 1; sz <= n / 2; sz ++) {
res += sz - 1;
}
return res;
}
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