Cod sursa(job #2343447)

Utilizator flibiaVisanu Cristian flibia Data 13 februarie 2019 23:27:23
Problema Radix Sort Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.18 kb
#pragma GCC optimize("03")
#include <bits/stdc++.h>

using namespace std;

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

int n;
int a, b, c, v[10000100], tp, idx[256], counter[256], aux[10000010];
vector <int> w[256];

int main() {
	in >> n >> a >> b >> c;
	v[1] = b;
	for (int i = 2; i <= n; i++)
		v[i] = (1LL * a * v[i - 1] + b) % c;
	for (int os = 0; os < 4; os++) {
		memset(counter, 0, sizeof counter);
		for (int i = 1; i <= n; i++)
			counter[(v[i] >> (8 * os)) & 255]++;
		idx[0] = 0;
		for (int i = 1; i < 256; i++)
			idx[i] = idx[i - 1] + counter[i - 1];	
		int i = 1;
		while (i + 3 <= n) {
			aux[++idx[(v[i] >> (8 * os)) & 255]] = v[i];
			aux[++idx[(v[i + 1] >> (8 * os)) & 255]] = v[i + 1];
			aux[++idx[(v[i + 2] >> (8 * os)) & 255]] = v[i + 2];
			aux[++idx[(v[i + 3] >> (8 * os)) & 255]] = v[i + 3];
			i += 4;
		}
		if (i <= n)
			aux[++idx[(v[i] >> (8 * os)) & 255]] = v[i];
		if (i + 1 <= n)
			aux[++idx[(v[i + 1] >> (8 * os)) & 255]] = v[i + 1];
		if (i + 2 <= n)
			aux[++idx[(v[i + 2] >> (8 * os)) & 255]] = v[i + 2];
		memcpy(v, aux, sizeof(v));
	}
	for (int i = 1; i <= n; i += 10)
		out << v[i] << ' ';
	return 0;
}