Cod sursa(job #2057292)

Utilizator neth------ neth Data 4 noiembrie 2017 15:09:25
Problema Radix Sort Scor 30
Compilator cpp Status done
Runda Arhiva educationala Marime 1.68 kb
#include <bits/stdc++.h>
using namespace std;
#pragma GCC optimize "O3"
#define uint unsigned int
ifstream fi("radixsort.in");
ofstream fo("radixsort.out");

#define BUFMAX 11000000
int bufcnt = BUFMAX - 1; char buf[BUFMAX];
inline void write(uint 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
#define MASK 0x1
uint v[MAX];

inline void radix(int lef, int rig, uint v[], int bit) {
  int x[MASK + 1], y[MASK + 1];
  memset(y, 0, sizeof y);
  for (int i = lef; i < rig; i++) y[v[i] >> bit & MASK]++;
  y[0] += lef; 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++) cout << x[i] << ' ' << y[i] << '\n';
  for (int i = 0; i <= MASK; i++)
    while (x[i] < y[i]) {
      int j = v[x[i]] >> bit & MASK;
      if (i != j) {
        while ((v[x[j]] >> bit & MASK) == j) x[j]++;
        v[x[i]] ^= v[x[j]] ^= v[x[i]] ^= v[x[j]];
      } else x[i]++;
    }
  for (int i = 1; i <= MASK; i++) x[i] = y[i - 1]; x[0] = lef;
  for (int i = 0; i <= MASK; i++) if (x[i] < y[i] && bit > 0) {
    //cout << x[i] << ' ' << y[i] << ' ' << bit - 8 << ' ' << i << '\n';
    radix(x[i], y[i], v, bit - 1);
  }
}

int main() {
  int n; unsigned long long a; uint b, c; 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;
    uint thi = t >> 32, tlo = t; int aux;
    asm("divl %4" : "=a"(aux), "=d"(v[i]) : "0"(tlo), "1"(thi), "r"(c));
  }
  radix(0, n, v, 31);
  for (int i = n - 1 - (n - 1) % 10; i >= 0; i -= 10) write(v[i]); flush();
}