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Cod sursa(job #649380)
//Radix sort
#include <fstream>
#include <vector>
#include <queue>
#define INFILE "algsort.in"
#define OUTFILE "algsort.out"
using namespace std;
void radixsort(vector<int> &v)
{
unsigned char mask = 255;
queue<int> buckets[256];
int nbytes = sizeof(int);
for(int i = 0; i<nbytes; ++i)
{
for(vector<int>::iterator it = v.begin(); it != v.end(); ++it)
buckets[(*it)>>(i<<3)&mask].push(*it);
v.clear();
for(int j = 0; j<256; ++j) {
while (!buckets[j].empty()) {
v.push_back(buckets[j].front());
buckets[j].pop();
}
}
}
}
int main()
{
vector<int> v;
int n;
ifstream fin(INFILE);
ofstream fout(OUTFILE);
fin >> n;
v.reserve(n);
for(int i = 0; i<n; ++i){
int k;
fin >> k;
v.push_back(k);
}
radixsort(v);
for(vector<int>::iterator it = v.begin(); it != v.end(); ++it)
fout << *it << " ";
fin.close();
fout.close();
return 0;
}