Cod sursa(job #2155805)

Utilizator inquisitorAnders inquisitor Data 8 martie 2018 09:45:25
Problema Sortare prin comparare Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.76 kb
#include <cstdio>

int N, v[500000], w[500000];

void CountingSort(int A[], int B[], int digit)
{
    int frequence[256]{}, index[256], i = N; index[0] = ~0;

    while(i) ++frequence[A[--i] >> digit & 255];

    for(; i != 256; index[++i] = index[~-i] + frequence[~-i]);

    for(i = 0; i != N; ++i) B[++index[A[i] >> digit & 255]] = A[i];
}

int main()
{
    freopen("algsort.in", "r", stdin);
    freopen("algsort.out", "w", stdout);

    scanf("%d", &N);

    for(int i = 0; i != N; ++i)
    {
        scanf("%d", &v[i]);
    }

    CountingSort(v, w,  0);
    CountingSort(w, v,  8);
    CountingSort(v, w, 16);
    CountingSort(w, v, 24);

    for(int i = 0; i != N; ++i)
    {
        printf("%d ", v[i]);
    }

    return 0;
}