Cod sursa(job #2297082)

Utilizator bleo16783FMI Bleotiu Cristian bleo16783 Data 5 decembrie 2018 12:23:34
Problema Radix Sort Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.9 kb
#include <iostream>
#include <fstream>
#include <cstring>
#include <vector>
using namespace std;
#define N 10001000
#define mask (1 << 8) -1
#define pos(x) (x >> (it * 8) ) & mask
int v[2][N];
void radix(int v[2][N],int dim)
{
    int i,it,cnt[mask + 1],index[mask + 1];
    for (it = 0; it < 4; ++it)
    {
        memset(cnt,0,sizeof(cnt));
        for (i = 0; i < dim; ++i)
            ++cnt[(v[it & 1][i] >> (it * 8)) & mask ];
        index[0] = 0;
        for (i = 1;i < mask + 1; ++i)
            index[i] = index[i - 1] + cnt[i - 1];
        for (i = 0; i < dim; ++i)
        v[( it + 1) & 1][index[pos(v[it & 1][i])]++] = v[it & 1][i];
    }
}
int main()
{
    ifstream fin ("radixsort.in");
    ofstream fout ("radixsort.out");
    int i,n = 0;
    while(fin >> v[0][n])
        ++n;
    radix(v,n);
    for(int i = 0; i < n; ++i)
        fout << v[0][i] << ' ';
    return 0;
}