Cod sursa(job #2654151)

Utilizator raikadoCri Lu raikado Data 29 septembrie 2020 21:58:11
Problema Radix Sort Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.02 kb
#include <fstream>
#include <array>

using namespace std;

const int MAXN = 10000000;

// array<uint, MAXN> vect;
// array<uint, MAXN> temp;
uint buf1[MAXN];
uint buf2[MAXN];

uint* radixsort(uint N, uint *vect)
{	
	array<uint, 256> buckets;
	uint *temp = buf2;

	for (uint round = 0, step = 0; round < sizeof(uint); round++, step += 8) {
		buckets.fill(0);

		for (uint i = 0; i < N; i++)
			buckets[(vect[i] >> step) & 255]++;

		for (uint i = 1; i < buckets.size(); i++)
			buckets[i] += buckets[i-1];

		for (int i = N-1; i != -1; i--)
		{
			uint b = (vect[i] >> step) & 255;
			buckets[b]--;
			temp[buckets[b]] = vect[i];
		}

		swap(vect, temp);
	}

	return vect;

}


int main(int argc, char const *argv[])
{
	ifstream fin("radixsort.in");
	ofstream fout("radixsort.out");

	unsigned long long N, A, B, C;
	fin >> N >> A >> B >> C;

	buf1[0] = B;
	for (uint i = 1; i < N; i++)
	{
		buf1[i] = ((((A * buf1[i-1]) % C + B) % C));
	}

	uint* vect = radixsort(N, buf1);
	for (uint i = 0; i < N; i += 10)
		fout << vect[i] << ' ';

	return 0;
}