Cod sursa(job #2057780)

Utilizator neth------ neth Data 4 noiembrie 2017 19:09:13
Problema Radix Sort Scor 70
Compilator cpp Status done
Runda Arhiva educationala Marime 1.6 kb
#include <bits/stdc++.h>
using namespace std;
#pragma GCC optimize "O3"
ifstream fi("radixsort.in");
ofstream fo("radixsort.out");

#define BUFMAX 11000000
int bufcnt = BUFMAX - 1; char buf[BUFMAX];
inline void write(int x) {
  buf[bufcnt--] = ' ';
  do buf[bufcnt--] = x % 10 + '0', x /= 10; while (x);
}
inline void flush() { fo.write(buf + bufcnt + 1, BUFMAX - bufcnt - 2); }

#define MAX 10000000
int v[MAX];
const int BITS = 8;
const int MASK = (1 << BITS) - 1;

void radix(int lef, int rig, int bit) {
  int x[MASK + 1], y[MASK + 1];
  memset(y, 0, sizeof y); y[0] = lef;
  for (int i = lef; i < rig; i++) y[v[i] >> bit & MASK]++;
  for (int i = 1; i <= MASK; i++) y[i] += y[i - 1];
  for (int i = 1; i <= MASK; i++) x[i] = y[i - 1]; x[0] = lef;
  for (int i = 0; i <= MASK; i++)
    for (int xi = x[i], yi = y[i]; xi < yi; xi++)
      for (int j = v[xi] >> bit & MASK; j != i; j = v[xi] >> bit & MASK) {
        int xj; for (xj = x[j]; (v[xj] >> bit & MASK) == j; xj++); x[j] = xj;
        auto tmp = v[xi];
        v[xi] = v[xj];
        v[xj] = tmp;
      }
  if (bit <= 0) return;
  for (int i = 1; i <= MASK; i++) x[i] = y[i - 1]; x[0] = lef;
  for (int i = 0; i <= MASK; i++)
    if (y[i] - x[i] > 1) radix(x[i], y[i], bit - 8);
}

int main() {
  int n, b, c; unsigned long long a; fi >> n >> a >> b >> c;
  v[0] = b; a %= c, b %= c;
  for (int i = 1; i < n; i++) {
    unsigned long long t = a * v[i - 1] + b;
    int thi = t >> 32, tlo = t; int aux;
    asm("divl %4" : "=a"(aux), "=d"(v[i]) : "0"(tlo), "1"(thi), "r"(c));
  }
  radix(0, n, 24);
  for (int i = n - 1 - (n - 1) % 10; i >= 0; i -= 10) write(v[i]); flush();
}