Cod sursa(job #601205)

Utilizator ELHoriaHoria Cretescu ELHoria Data 5 iulie 2011 12:55:44
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.63 kb
#include <cstdio>

int  n,  A[500001], B[500001];

void merge_sort(int l, int r)
{
    int m = (l + r) >> 1, i, j, k;
    if (l == r) return;
    merge_sort(l, m);
    merge_sort(m + 1, r);
    for (i=l, j=m+1, k=l; i<=m || j<=r; )
        if (j > r || (i <= m && A[i] < A[j]))
            B[k++] = A[i++];
        else
            B[k++] = A[j++];
    for (k = l; k <= r; k++) A[k] = B[k];
}

int main()
{
	freopen("algsort.in","r",stdin);
	freopen("algsort.out","w",stdout);
	scanf("%d",&n);
	for(int i=0;i<n;++i) scanf("%d",&A[i]);
	merge_sort(0,n-1);
	for(int i=0;i<n;++i) printf("%d ", A[i]);
	return 0;
}