Cod sursa(job #649391)

Utilizator vlad.doruIon Vlad-Doru vlad.doru Data 15 decembrie 2011 22:46:53
Problema Sortare prin comparare Scor 20
Compilator cpp Status done
Runda Arhiva educationala Marime 0.74 kb
#include <fstream>
#include <queue>

using namespace std;

ifstream in("algsort.in");
ofstream out("algsort.out");

const int N=500001;
const int biti=8;

int S=1<<biti;

queue <int> buckets[1<<8];

int v[N],n,maxim,pozstart;

void RadixSort(){
	int i,j,place,aux;
	for(i=0;maxim;maxim>>=biti,i+=biti){
		for(j=pozstart+1;j<=n;++j){
			if((v[j]>>i)==0){
				pozstart=j;
				continue;
			}
			place=((v[j]>>i)&255);
			buckets[place].push(v[j]);
		}
		aux=pozstart;
		for(j=0;j<=255;++j){
			while(!buckets[j].empty()){
				v[++aux]=buckets[j].front();
				buckets[j].pop();
			}
		}
	}
}

int main(){
	int i;
	in>>n;
	for(i=1;i<=n;++i){
		in>>v[i];
		if(v[i]>maxim)
			maxim=v[i];
	}
	RadixSort();
	for(i=1;i<=n;++i){
		out<<v[i]<<" ";
	}
	return 0;
}