Cod sursa(job #2532120)

Utilizator victorzarzuZarzu Victor victorzarzu Data 27 ianuarie 2020 13:19:52
Problema Radix Sort Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.72 kb
#include <bits/stdc++.h>
using namespace std;
ofstream g("radixsort.out");
int n,a,b,c;
int p = 31999;
char buffer[32010];

#define MAX_N 10000001
#define RADIX 0xFF
#define RADIX_SIZE 8

int numbers[MAX_N];

#define TOTAL_BYTES sizeof(numbers[0])
#define get_byte(x) ((x >> (byte * 8)) & RADIX)

void inc()
{
    ++p;
    if(p == 32000)
    {
        fread(buffer,1,32000,stdin);
        p = 0;
    }
}

void read(int &x)
{
    x = 0;
    while(buffer[p] < '0' || buffer[p] > '9')
        inc();
    while(buffer[p] >= '0' && buffer[p] <= '9')
    {
        x = x * 10 + buffer[p] - '0';
        inc();
    }
}

void Read()
{
    freopen("radixsort.in","r",stdin);
    read(n);
    read(a);
    read(b);
    read(c);
}

void Solve()
{
    int last = b,current;
    numbers[0] = b % c;
    for(int i = 1; i < n; i++)
        numbers[i] = (1LL * a * numbers[i-1] % c + b) % c;
}

void countSort(int A[],int B[],int byte)
{
    int counter[1 << RADIX_SIZE];
    int index[1 << RADIX_SIZE];

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

    for(int i = 0;i < n;++i)
        ++counter[get_byte(A[i])];

    index[0] = 0;

    for(int i = 1;i < 1 << RADIX_SIZE;++i)
        index[i] = index[i - 1] + counter[i - 1];

    for(int i = 0;i < n;++i)
        B[index[get_byte(A[i])]++] = A[i];
}

void RadixSort()
{
    int *temp = new int[n];
    for(int i = 0; i < TOTAL_BYTES;++i)
        if(i % 2 == 0)
            countSort(numbers, temp, i);
        else countSort(temp, numbers, i);
}

void Print()
{
    for(int i = 0; i < n - 1;i += 10)
        g<<numbers[i]<<" ";
    g.close();
}

int main()
{
    Read();
    Solve();
    RadixSort();;
    Print();
    return 0;
}