Cod sursa(job #551567)

Utilizator blastoiseZ.Z.Daniel blastoise Data 10 martie 2011 21:15:40
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.63 kb
#include <fstream>
#include <string.h>

using namespace std;

int i,N;
int v[500001],x[500001];

inline void radix(int byte,int a[],int b[])
{
	int i;
	int cnt[256],ind[256];

	memset(cnt,0,sizeof(cnt));

	for(i=0;i<N;i++) cnt[(a[i]>>byte)&255]++;

	ind[0]=0;
	for(i=1;i<256;i++) ind[i]=ind[i-1]+cnt[i-1];
	for(i=0;i<N;i++) b[ind[(a[i]>>byte)&255]++]=a[i];

}

int main()
{
	ifstream in("algsort.in");
	ofstream out("algsort.out");

	in>>N;

	for(i=0;i<N;i++) in>>v[i];

	radix(0,v,x);
	radix(8,x,v);
	radix(16,v,x);
	radix(24,x,v);

	for(i=0;i<N-1;i++) out<<v[i]<<' ';
	out<<v[N-1]<<'\n';

	return 0;
}