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Cod sursa(job #514038)
#include <cstdio>
#include <ctime>
#include <cstdlib>
#include <algorithm>
#define N 500001
using namespace std;
int a[N];
int n;
int part_lomuto (int l, int r)
{
int v = l + rand () % (r - l + 1);
swap (a[v], a[r]);
int i;
int nr = l - 1;
for (i = l; i <= r; ++i)
if (a[i] <= a[r])
swap (a[++nr], a[i]);
return nr;
}
void quick (int l, int r)
{
if (l >= r)
return;
int m = part_lomuto (l, r);
quick (l, m - 1);
quick (m + 1, r);
}
int main ()
{
freopen ("algsort.in", "r", stdin);
freopen ("algsort.out", "w", stdout);
scanf ("%d", &n);
for ( int i = 1; i <= n; ++i )
scanf ("%d ", a + i);
quick (1, n);
for (int i = 1; i <= n; ++i )
printf ("%d ", a[i]);
}