Cod sursa(job #1005948)

Utilizator alabala1vali smerica alabala1 Data 6 octombrie 2013 01:07:36
Problema Sortare prin comparare Scor 20
Compilator cpp Status done
Runda Arhiva educationala Marime 0.73 kb
#include<iostream>
#include<fstream>
void merges(unsigned st, unsigned dr, unsigned k [])
{
	if (st == dr)return;
	unsigned  m = (st + dr) / 2;
	merges(st, m, k);
	merges(m + 1, dr, k);
	unsigned c[500010], j = st, i = m + 1, s = 0;
	while (j <= m || i <= dr)
	{
		if (j > m){ c[s++] = k[i++]; continue; }
		if (i > dr){ c[s++] = k[j++]; continue; }
		if (k[j] > k[i])c[s++] = k[i++];
		else c[s++] = k[j++];
	}
	for (j = st, i = 0; i < s; i++, j++)k[j] = c[i];
}
int main()
{
	unsigned a[500010], n;
	std::ifstream f("algsort.in");
	f >> n;
	for (unsigned i = 0; i < n; i++)f >> a[i];
	f.close();
	merges(0, n - 1, a);
	std::ofstream g("algsort.out");
	for (unsigned i = 0; i < n; i++)g << a[i] << " ";
	g.close();
}