Cod sursa(job #2190403)

Utilizator AlexnolifeAlexandru Ica Alexnolife Data 30 martie 2018 18:01:44
Problema Radix Sort Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 2.24 kb
#include <fstream>
#include <cstring>

std::ifstream f("radixsort.in");
std::ofstream g("radixsort.out");

//using num_t = uint64_t;
//
//num_t N, A, B, C;
//num_t digits, max;
//constexpr num_t base = 10;
//
//std::array<num_t, 10000000> nums;
//
//num_t GetNumOfDigits(num_t n)
//{
//	num_t cnt = 0;
//
//	while (n) {
//		n /= 10;
//		++cnt;
//	}
//
//	return cnt;
//}
//
//void Generate()
//{
//	nums[0] = B;
//	max = nums[0];
//
//	for (num_t i = 1; i < N; ++i) {
//		nums[i] = (A * nums[i - 1] + B) % C;
//		
//		if (nums[i] > max) {
//			max = nums[i];
//		}
//	}
//
//	digits = GetNumOfDigits(max);
//}
//
//void Sort()
//{
//	num_t i, j, factor;
//	
//	std::queue<num_t> q[base];
//	
//	for (i = 0, factor = 1; i < digits; ++i, factor *= base) {
//		for (j = 0; j < N; ++j) {
//			q[(nums[j] / factor) % base].emplace(nums[j]);
//		}
//		
//		num_t k = 0;
//	
//		for (num_t l = 0; l < base; ++l) 
//			while (!q[l].empty()) {
//				nums[k++] = q[l].front();
//				q[l].pop();
//			}
//	}
//}
#define MAX_N 10000000 + 1
#define RADIX 0xFF
#define RADIX_SIZE 8
#define TOTAL_BYTES sizeof(numbers[0])
#define get_byte(x) ((x>>(byte * 8))&RADIX)

int n;
int numbers[MAX_N];

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]; // avem nevoie de un array ca spatiu temporar
	for (int i = 0; i < TOTAL_BYTES; i++) {
		if (i % 2 == 0)
			countsort(numbers, temp, i);// sortez dupa byte-ul i
		else
			countsort(temp, numbers, i);
	}
}
void read()
{
	int a, b, c;
	f >> n >> a >> b >> c;

	numbers[0] = b % c;
	for (int i = 1; i < n; i++)
		numbers[i] = (1LL * a * numbers[i - 1] % c + b) % c;
}

void Print()
{
	for (int i = 0; i < n; i = i + 10) {
		g << numbers[i] << ' ';
	}
}

int main(int, char *[])
{	
	//Generate();
	//Sort();
	//Print();

	read();
	radixsort();
	Print();

	return 0;
}