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Cod sursa(job #240123)
#include <fstream>
using namespace std;
typedef unsigned int uint;
const uint maxn = 500000;
const uint maxsz = 32;
const uint maxd = 16;
const uint maxr = 1 << maxd;
const uint mask = (1 << maxd) - 1;
ifstream in("algsort.in");
ofstream out("algsort.out");
int n;
uint a[maxn];
uint cnt[maxr], off[maxr];
void read()
{
in >> n;
for ( int i = 0; i < n; ++i )
in >> a[i];
}
uint get(uint x, uint nr)
{
return ((x >> nr) & mask);
}
uint t[maxn];
void sort(uint pass)
{
for ( uint i = 0; i < maxr; ++i )
cnt[i] = 0;
for ( int i = 0; i < n; ++i )
++cnt[ get(a[i], pass) ];
off[0] = 0;
for ( uint i = 1; i < maxr; ++i )
off[i] = off[i-1] + cnt[i-1];
for ( int i = 0; i < n; ++i )
t[ off[get(a[i], pass)]++ ] = a[i];
for ( int i = 0; i < n; ++i )
a[i] = t[i];
}
void radix()
{
for ( uint i = 0; i < maxsz; i += maxd )
sort(i);
}
int main()
{
read();
radix();
for ( int i = 0; i < n; ++i )
out << a[i] << " ";
return 0;
}