Cod sursa(job #2307866)

Utilizator mihailescu_eduardMihailescu Eduard-Florin mihailescu_eduard Data 25 decembrie 2018 19:36:27
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.83 kb
#include <fstream>
#include <string.h>
using namespace std;

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

static const int NMAX = 5e5 + 5;

int n;
int v[NMAX], k[NMAX], p[256];
int base, basemax;

inline int rest(int x)
{
    return (x >> (8*base)) & 255;
}

int main()
{
    int i;
    fin >> n;
    for(int i =1; i<= n; ++i)
        fin >> v[i];
    base = 0;
    basemax = 4;
    while(base < basemax)
    {
        memset(p, 0, sizeof(p));

        for(i = 1; i<= n ;++i)
            p[rest(v[i])]++;

        for(i = 1; i <= 255; ++i)
            p[i]+= p[i-1];

        for(i = n; i>= 1; i--)
            k[p[rest(v[i])]--] = v[i];

        for(i = 1; i<= n; ++i)
            v[i] = k[i];
        base++;
    }
    for(i = 1; i<= n; ++i)
        fout << v[i] << " ";

    return 0;
}