Cod sursa(job #2596775)

Utilizator CharacterMeCharacter Me CharacterMe Data 10 aprilie 2020 13:25:19
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.86 kb
#include <bits/stdc++.h>
#define BYTE(x) ((x >> (dv * 8)) & 255)

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

int n;
int numb[500005], trash[500005];
int cnt[256];

void radix(int dv, int a[], int b[]);

int main()
{

    fin >> n;
    for(int i = 1; i <= n; ++i){
        fin >> numb[i];
    }

    for(int i = 0; i < 4; ++i){
        if(!(i & 1)) radix(i, numb, trash);
        else radix(i, trash, numb);
    }

    for(int i = 1; i <= n; ++i)
        fout << numb[i] << " ";

    return 0;
}

void radix(int dv, int a[], int b[]){
    memset(cnt, 0, sizeof(cnt));

    for(int i = 1; i <= n; ++i){
        ++cnt[BYTE(a[i]) + 1];
    }

    cnt[0] = 1;

    for(int i = 1; i < 256; ++i) cnt[i] += cnt[i - 1];

    for(int i = 1; i <= n; ++i){
        b[cnt[BYTE(a[i])]++] = a[i];
    }

}