Cod sursa(job #1066363)

Utilizator DyaStarDiana Boiangiu DyaStar Data 24 decembrie 2013 16:38:32
Problema Sortare prin comparare Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.61 kb
#include<iostream>
#include<stdlib.h>
#include<fstream>
using namespace std;
int v[500001],n,q;

void partitie(int li,int ls,int &q)
{int i,x;
i=li;
q=li+rand()%(ls-li+1);
swap(v[ls],v[q]);
x=v[ls];
q=li-1;
while(i<=ls)
{if(v[i]<=x)
   {q++;
    swap(v[q],v[i]);
   }
   i++;
}
if(q>=ls)
    q--;
}
void quick(int li, int ls)
{int q=0;
 if(ls>li)
{partitie(li,ls,q);
 quick(li,q-1);
 quick(q+1,ls);
}
}
int main()
{ifstream f("algsort.in");
 ofstream g("algsort.out");
 f>>n;
for(int i=0;i<n;i++)
	f>>v[i];
quick(0,n-1);
for(int i=0;i<n;i++)
	g<<v[i]<<" ";
	f.close();
	g.close();
}