Cod sursa(job #2057939)

Utilizator neth------ neth Data 4 noiembrie 2017 21:45:39
Problema Radix Sort Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.3 kb
#include <stdio.h>

#define MAX 10000000
int v[MAX];
int n, i, a, b, t;

#define BITS 4
#define MASK 0xf
#define TINY 0xf

inline void insertion(int lef, int rig) {
  for (a = lef; a < rig; ++a) {
    for (t = v[a], b = a - 1; b >= lef; --b)
      if (t < v[b]) v[b + 1] = v[b]; else break;
    v[b + 1] = t;
  }
}

void radix(int lef, int rig, char bit) {
  int x[MASK + 1], y[MASK + 1];
  y[0] = lef; for (i = 1; i <= MASK; ++i) y[i] = 0;
  for (i = lef; i < rig; ++i) ++y[v[i] >> bit & MASK];
  for (i = 1; i <= MASK; ++i) y[i] += y[i - 1];
  for (i = 1; i <= MASK; ++i) x[i] = y[i - 1]; x[0] = lef;
  for (a = 0; a <= MASK; ++a)
    for (; x[a] < y[a]; ++x[a])
      for (b = v[x[a]] >> bit & MASK; b != a; b = v[x[a]] >> bit & MASK) {
        t = v[x[a]]; v[x[a]] = v[x[b]]; v[x[b]++] = t; }
  if (bit <= 0) return;
  for (i = 1; i <= MASK; ++i) x[i] = y[i - 1]; x[0] = lef;
  for (int w = 0; w <= MASK; ++w) {
    if (y[w] - x[w] < 2) continue;
    if (y[w] - x[w] < TINY) insertion(x[w], y[w]);
    else radix(x[w], y[w], bit - BITS);
  }
}

int main() {
  freopen("radixsort.in", "r", stdin);
  freopen("radixsort.out", "w", stdout);
  scanf("%d%d%d%d", &n, &a, &v[0], &b);
  for (i = 1; i < n; ++i) v[i] = (1ULL * a * v[i - 1] + v[0]) % b;
  radix(0, n, 31 - 31 % BITS);
  for (i = 0; i < n; i += 10) printf("%d ", v[i]);
}