Cod sursa(job #661197)

Utilizator DaicuDaicu Alexandru Daicu Data 13 ianuarie 2012 23:16:39
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.58 kb
#include<stdio.h>
#include<stdlib.h>
int a[500001],n;
void citire(){
	scanf("%d",&n);
	for(int i=1;i<=n;i++)
		scanf("%d",&a[i]);
}

void afisare(){
	for(int i=1;i<=n;i++)
		printf("%d ",a[i]);
}

void qsort(int st,int dr){
	int i=st,j=dr,p=a[i+rand()%(j-i)];
	while(i<=j){
		while(a[i]<p)
			++i;
		while(a[j]>p)
			--j;
		if(i<=j)
			a[i]=a[i]^a[j]^(a[j]=a[i]),--j,++i;
	}
	if(st<j)
		qsort(st,j);
	if(dr>i)
		qsort(i,dr);
}

int main(){
	freopen("algsort.in","r",stdin);
	freopen("algsort.out","w",stdout);
	citire();
	qsort(1,n);
	afisare();
	return 0;
}