Cod sursa(job #2679334)

Utilizator LucaMihaiLM10Luca Ilie LucaMihaiLM10 Data 30 noiembrie 2020 12:41:01
Problema Sortare prin comparare Scor 100
Compilator c-64 Status done
Runda Arhiva educationala Marime 1.57 kb
#include <stdio.h>
#define MAX_N 500000
#define VAL (1 << 31)
#define BUCK (1 << 16)
#define VAL_PER_BUCK (1 << 15)
#define VAL_PER_BUCK_B 15
int v[MAX_N], vsort[MAX_N], ind[BUCK], val[BUCK], f[VAL_PER_BUCK];
int getBucketNum( int a ) {
    return a >> VAL_PER_BUCK_B;
}
void sort( int begin, int end ) {
    int aux, b, e, p;
    b = begin;
    e = end;
    p = vsort[(begin + end) / 2];
    while ( vsort[b] < p )
        b++;
    while ( vsort[e] > p )
        e--;
    while ( b < e ) {
        aux = vsort[b];
        vsort[b] = vsort[e];
        vsort[e] = aux;
        do
            b++;
        while ( vsort[b] < p );
        do
            e--;
        while ( vsort[e] > p );
    }
    if ( begin < e )
        sort( begin, e );
    if ( e + 1 < end )
        sort( e + 1, end );
}
int main() {
    FILE *fin, *fout;
    int n, p, i;
    fin = fopen( "algsort.in", "r" );
    fscanf( fin, "%d", &n );
    for ( i = 0; i < n; i++ )
        fscanf( fin, "%d", &v[i] );
    fclose( fin );
    for ( i = 0; i < n; i++ )
        val[getBucketNum( v[i] )]++;
    ind[0] = 0;
    for ( i = 1; i < BUCK; i++ )
        ind[i] = ind[i - 1] + val[i - 1];
    for ( i = 0; i < n; i++ ) {
        p = getBucketNum( v[i] );
        vsort[ind[p]] = v[i];
        ind[p]++;
    }
    for ( i = 0; i < BUCK; i++ ) {
        if ( val[i] != 0 )
            sort( ind[i] - val[i], ind[i] - 1 );
    }
    fout = fopen( "algsort.out", "w" );
    for ( i = 0; i < n; i++ )
        fprintf( fout, "%d ", vsort[i] );
    fclose( fout );
    return 0;
}