Cod sursa(job #1393896)

Utilizator danalex97Dan H Alexandru danalex97 Data 19 martie 2015 20:42:41
Problema Radix Sort Scor 30
Compilator cpp Status done
Runda Arhiva educationala Marime 1.07 kb
#include <fstream>
#include <algorithm>
#include <vector>
#include <iostream>
using namespace std;

ifstream F("radixsort.in");
ofstream G("radixsort.out");

const int N = 10000010;
const int sz = 16;
const int M = 1<<sz;

int n,x,y,z,a[N],b[N];
int ct[M];

void phase1()
{
    for (int i=1;i<=n;++i) ct[a[i]&(M-1)]++;
    for (int i=1;i<M;++i) ct[i] += ct[i-1];
    for (int i=M-1;i>0;--i) ct[i] = ct[i-1]+1; ct[0] = 1;
    for (int i=1;i<=n;++i) b[ct[a[i]&(M-1)]++] = a[i];
}

void phase2()
{
    for (int i=0;i<M;++i) ct[i] = 0;
    for (int i=1;i<=n;++i) ct[(b[i]&((M-1)<<sz))>>sz]++;
    for (int i=1;i<M;++i) ct[i] += ct[i-1];
    for (int i=M-1;i>0;--i) ct[i] = ct[i-1]+1; ct[0] = 1;
    for (int i=1;i<=n;++i) a[ct[(b[i]&((M-1)<<sz))>>sz]++] = b[i];
}

void mysort()
{
    phase1();
    //for (int i=1;i<=n;i+=10) cerr<<b[i]<<' ';
    phase2();
}

int main()
{
    F>>n>>x>>y>>z;
    a[1] = y;
    for (int i=2;i<=n;++i)
        a[i] = (a[i-1] * x + y) % z;
    mysort();
    for (int i=1;i<=n;i+=10)
        G<<a[i]<<' ';
    G<<'\n';
}