Cod sursa(job #1012965)

Utilizator Teodor94Teodor Plop Teodor94 Data 19 octombrie 2013 23:11:03
Problema Sortare prin comparare Scor 60
Compilator cpp Status done
Runda Arhiva educationala Marime 1.1 kb
#include <cstdio>
#include <cassert>
#include <vector>

using namespace std;

#define MAX_N 500000

int n, v[MAX_N];

void read( FILE *fin ) {
    assert( fscanf( fin, "%d", &n ) == 1 );
    for ( int i = 0; i < n; ++i )
        assert( fscanf( fin, "%d", &v[i] ) == 1 );
}

void write( FILE *fout ) {
    for ( int i = 0; i < n; ++i )
        fprintf( fout, "%d ", v[i] );
}

void swap( int &a, int &b ) {
    int aux = a;
    a = b;
    b = aux;
}

void radix_sort( int power10 ) {
    if ( power10 < 0 )
        return;

    vector < int > a[10];

    for ( int i = 0; i < n; ++i )
        a[ v[i] / power10 % 10 ].push_back( v[i] );

    int curr_pos = 0;
    for ( int i = 0; i < 10; ++i ) {
        for ( vector < int > :: iterator it = a[i].begin(); it != a[i].end(); ++it ) {
            v[curr_pos] = *it;
            ++curr_pos;
        }

        a[i].clear();
    }

    radix_sort( power10 * 10 );
}

int main() {
    FILE *fin, *fout;

    fin = fopen( "algsort.in", "r" );
    read( fin );
    fclose( fin );

    radix_sort( 1 );

    fout = fopen( "algsort.out", "w" );
    write( fout );
    fclose( fout );
}