Cod sursa(job #1175776)

Utilizator badea_adi1999Badea Adrian Catalin badea_adi1999 Data 24 aprilie 2014 22:00:10
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.57 kb
#include <cstdio>
#include <algorithm>
using namespace std;
FILE *f=fopen("algsort.in","r");
FILE *g=fopen("algsort.out","w");
int v[500001];

void qs(int p,int q)
{int st=p,dr=q,x=v[(st+dr)>>1];
do
  {while (st<q&&v[st]<x) st++;
   while (dr>p&&v[dr]>x) dr--;
   if (st<=dr) {swap(v[st],v[dr]);
                st++;dr--;
                }

   }while (st<=dr);
if (p<dr) qs(p,dr);
if (st<q) qs(st,q);
}

int main()
{int n,i,j;
fscanf(f,"%d",&n);
for (i=1;i<=n;i++) fscanf(f,"%d",&v[i]);
qs(1,n);
for (i=1;i<=n;i++) fprintf(g,"%d ",v[i]);
return 0;
}