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Cod sursa(job #589561)
#include <iostream>
#include <stdio.h>
using namespace std;
const int d=500001;
void Swap(int &a, int &b){
int aux;
aux=a;
a=b;
b=aux;
}
int Partition(int x[d], int l, int r){
int i,j;
int p;
p=x[l];
i=l;
for (j=l+1;j<r;j++)
if(x[j]<=p){
i++;
Swap(x[i],x[j]);
}
Swap(x[l],x[i]);
return i;
}
void QuickSort(int x[d], int l, int r){
int m;
if (l<r){
m=Partition(x,l,r);
QuickSort(x,l,m);
QuickSort(x,m+1,r);
}
}
int main(){
freopen("algsort.in","r",stdin);
freopen("algsort.out","w",stdout);
int n;
cin>>n;
int a[d];
for (int i=0; i<n; ++i)
cin>>a[i];
QuickSort(a,0,n);
for (int i=0; i<n; ++i)
cout<<a[i]<<" ";
return 0;
}