Cod sursa(job #2806624)

Utilizator victorzarzuZarzu Victor victorzarzu Data 22 noiembrie 2021 20:50:16
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.9 kb
#include <bits/stdc++.h>
#define oo 0x3f3f3f3f 
#define get_byte(x) ((x >> (8 * byte)) & 255)

using namespace std;
ifstream f("algsort.in");
ofstream g("algsort.out");
int n, a[5000001];

void read()
{
  f>>n;
  for(int i = 1;i <= n;++i)
    f>>a[i];
}

void countsort(int x[], int y[], int byte)
{
  int counter[1 << 8];
  int index[1 << 8];

  memset(counter, 0, sizeof(counter));

  for(int i = 1;i <= n;++i)
    counter[get_byte(x[i])]++;
  
  index[0] = 1;
  for(int i = 1;i < (1 << 8);++i)
    index[i] = index[i - 1] + counter[i - 1]; 
  
  for(int i = 1;i <= n;++i)
    y[index[get_byte(x[i])]++] = x[i];
}

void solve()
{
  int *temp = new int[500001];
  for(int i = 0;i < 4;++i)
    if(i & 1)
      countsort(temp, a, i);
    else
      countsort(a, temp, i);
  for(int i = 1;i <= n;++i)
    g<<a[i]<<" ";
} 

int main()
{
  read();
  solve();
  return 0;
}