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Cod sursa(job #608620)
#include <fstream.h>
#define MAX 500002
ifstream f("algsort.in");
ofstream g("algsort.out");
int v[MAX],s[2000];
int main()
{
int i,j,p,n,aux,c=0,start,stop;
f>>n;
for(i=1;i<=n;i++)
f>>v[i];
s[c++]=1;
s[c++]=n;
while(c>0)
{
stop=s[--c], start=s[--c];
if(stop<=start)
continue;
i=start;
j=stop;
p=v[(start+stop)>>1];
while(i<j)
{
while(v[i]<p && i<=stop)
i++;
while(v[j]>p && j>=start)
j--;
if(i<j)
{
aux=v[i], v[i]=v[j], v[j]=aux;
if(v[i]==v[j]) i++,j--;
}
}
if(i-start > stop-i)
{
s[c++]=i, s[c++]=stop;
s[c++]=start, s[c++]=i-1;
}
else
{
s[c++]=i+1, s[c++]=stop;
s[c++]=start, s[c++]=i;
}
}
for(i=1;i<=n;i++)
g<<v[i]<<" ";
f.close();
g.close();
return 0;
}