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Cod sursa(job #288162)
#include<fstream>
#include<iostream>
#define dim 500000
using namespace std;
long long a[dim];
unsigned long n;
void qsort(unsigned long inc, unsigned long sf)
{unsigned long i,j;
long long temp,aux;
i=inc;
j=sf;
temp=a[(i+j)/2];
do
{while(a[i]<temp) i++;
while(a[j]>temp) j--;
if(i<j) aux=a[i],a[i]=a[j],a[j]=aux;
if(i<=j) j=j-1,i+=1;
} while(i<=j);
if(inc<j) qsort(inc,j);
if(i<sf) qsort(i,sf);
}
int main()
{unsigned long i;
ifstream f("algsort.in");
ofstream g("algsort.out");
f>>n;
for(i=1;i<=n;i++)
f>>a[i];
f.close();
qsort(1,n);
for(i=1;i<=n;i++)
g<<a[i]<<" ";
g<<'\n';
g.close();
return 0;
}