Cod sursa(job #2675885)

Utilizator AlexNicuNicu Alexandru AlexNicu Data 22 noiembrie 2020 19:10:59
Problema Sortare prin comparare Scor 80
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.92 kb
#include <fstream>
#include <vector>
#include <algorithm>

using namespace std;
#define MAX_N 500000
#define NO_VALUES (1 << 31)
#define NO_BUCKETS (1 << 16)
#define VALUES_PER_BUCKET (1 << 15)
#define VALUES_PER_BUCKET_BITS 15
int v[MAX_N];
vector<int> bucket[NO_BUCKETS];

inline int getBucketNumber(int value) {
  return value >> VALUES_PER_BUCKET_BITS;
}

int main() {
  FILE* fin = fopen("algsort.in", "r");
  int n, i, j, k;
  fscanf(fin, "%d", &n);
  for (i = 0; i < n; ++i)
    fscanf(fin, "%d", &v[i]);
  fclose(fin);

  for (i = 0; i < n; ++i)
    bucket[getBucketNumber(v[i])].push_back(v[i]);

  k = 0;
  for (i = 0; i < NO_BUCKETS; ++i) {
    sort( bucket[i].begin(), bucket[i].end());
    for (j = 0; j < bucket[i].size(); ++j)
      v[k++] = bucket[i][j];
  }

  FILE* fout = fopen("algsort.out", "w");
  for (i = 0; i < n; ++i)
    fprintf(fout, "%d ", v[i]);
  fclose(fout);
  return 0;
}