Mai intai trebuie sa te autentifici.
Cod sursa(job #1783813)
Utilizator | Data | 19 octombrie 2016 15:07:49 | |
---|---|---|---|
Problema | Sortare prin comparare | Scor | 100 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 1.56 kb |
#include <iostream>
#include <fstream>
#define TOTAL_BYTE 2
#define get_byte(x) ((x >> (16 * byte)) & 0xFFFF)
#define RADIX_SIZE 16
#define BUFF_SIZE 100000
using namespace std;
ifstream in("algsort.in");
ofstream out("algsort.out");
int *a, n;
char BUFF[BUFF_SIZE];
int pos = 0;
void Read(int &a)
{
while(!isdigit(BUFF[pos]))
if(++pos == BUFF_SIZE)
in.read(BUFF,BUFF_SIZE), pos = 0;
a = 0;
while(isdigit(BUFF[pos]))
{
a = a * 10 + (BUFF[pos] - '0');
if(++pos == BUFF_SIZE)
in.read(BUFF,BUFF_SIZE), pos = 0;
}
}
void CountSort(int a[], int b[], int byte, int n)
{
int _count[1 << RADIX_SIZE];
int ind[1 << RADIX_SIZE];
int length = (1 << RADIX_SIZE) - 1;
for (int i = 0; i <= length; i++)
_count[i] = 0;
for (int i = 1; i <= n; i++)
_count[get_byte(a[i])]++;
ind[0] = 1;
for (int i = 1; i <= length; i++)
ind[i] = ind[i - 1] + _count[i - 1];
for (int i = 1; i <= n; i++)
b[ind[get_byte(a[i])]++] = a[i];
}
void RadixSort(int a[], int n)
{
int *temp = new int[n+1];
for (int i = 0; i < TOTAL_BYTE; i++)
if (i % 2 == 0)
CountSort(a,temp,i,n);
else
CountSort(temp,a,i,n);
delete[] temp;
}
int main()
{
Read(n);
a = new int[n+1];
for (int i = 1; i <= n; i++)
Read(a[i]);
in.close();
RadixSort(a,n);
for (int i = 1; i <= n; i++)
out << a[i] << " ";
out.close();
delete[] a;
return 0;
}