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Cod sursa(job #323498)
//Randomized Quicksort
#include <cstdio>
#include <cstdlib>
#define N 500001
int A[N];
int poz(int a, int b)
{
int i,j,t,r=a+rand()%(b-a+1);
t=A[a]; A[a]=A[r]; A[r]=t;
for (i=0, j=-1; a<b; a+=i, b+=j)
if (A[a]>=A[b])
{
t=A[a]; A[a]=A[b]; A[b]=t;
t=i; i=-j; j=-t;
}
return a;
}
void sort(int a, int b)
{
if (a<b)
{
int m=poz(a,b);
sort(a,m-1);
sort(m+1,b);
}
}
int main()
{
int i,n;
freopen("algsort.in","r",stdin);
freopen("algsort.out","w",stdout);
scanf("%d",&n);
for (i=1; i<=n; i++) scanf("%d",&A[i]);
sort(1,n);
for (i=1; i<=n; i++) printf("%d ",A[i]);
return 0;
}