Cod sursa(job #443289)

Utilizator nandoLicker Nandor nando Data 16 aprilie 2010 17:20:30
Problema Sortare prin comparare Scor 60
Compilator cpp Status done
Runda Arhiva educationala Marime 0.87 kb
#include <cstdio>
#include <algorithm>
using namespace std;

FILE* fin=fopen("algsort.in","r");
FILE* fout=fopen("algsort.out","w");

#define MAXN 500005
#define BASE 1024
#define max(a,b) (((a)>(b))?(a):(b))

int n,vec[MAXN],b[MAXN],maxv=-1;

bool comp(int a,int b){
	return a%BASE<b%BASE;
}

void radixSort(){
	int exp=1;
	while(maxv/exp>0){
		int bucket[BASE]={0};
		for(int i=0;i<n;++i)
			++bucket[vec[i]/exp%BASE];
		for(int i=1;i<BASE;++i)
			bucket[i]+=bucket[i-1];
		for(int i=n-1;i>=0;--i)
			b[--bucket[vec[i]/exp%BASE]]=vec[i];
		for(int i=0;i<n;++i){
			vec[i]=b[i];
		}
		exp*=BASE;
	}
}

int main(){
	fscanf(fin,"%d ",&n);

	for(int i=0;i<n;i++){
		fscanf(fin,"%d ",&vec[i]);	
		maxv=max(vec[i],maxv);
	}
	
	radixSort();
	
	for(int i=0;i<n;i++){
		fprintf(fout,"%d ",vec[i]);
	}

	fclose(fin);
	fclose(fout);
	return 0;
}