Cod sursa(job #1223366)

Utilizator gabrielinelusGabriel-Robert Inelus gabrielinelus Data 28 august 2014 01:35:29
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.22 kb
#include <cstdio>
#include <vector>
#include <algorithm>

#define MASK 255
#define DIM 1666013

using namespace std;
int N;
vector<int> V;
char buffer[DIM];
int poz = DIM - 1;
void scanf(int &A){
    A = 0;
    while('0' > buffer[poz] || buffer[poz] >'9')
        if(++poz == DIM)
            fread(buffer,1,DIM,stdin),poz = 0;
    while('0' <= buffer[poz] && buffer[poz] <= '9'){
        A = A * 10 + buffer[poz] - 48;
        if(++poz == DIM)
            fread(buffer,1,DIM,stdin),poz = 0;
    }
}

void Sort(vector<int>&V,int disp)
{
    vector<int> bucket[256];
    for(int i = 0; i < (int)V.size(); ++i)
        bucket[(V[i]>>disp) & MASK ].push_back(V[i]);
    for(int i = 0,pz = 0; i <= 255; ++i)
        for(int j = 0; j < (int) bucket[i].size(); ++j,++pz)
            V[pz] = bucket[i][j];
}

void read()
{
    scanf(N);
    int b;
    for(int i = 1; i <= N; ++i){
        scanf(b);
        V.push_back(b);
    }
}

void Bucket()
{
    for(int i = 0; i < 32; i += 8)
        Sort(V,i);
}

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

    read();
    Bucket();
    for(int i = 0; i < N; ++i )
        printf("%d ",V[i]);

    return 0;
}