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Cod sursa(job #269986)
#include <stdio.h>
unsigned long n,m,a[100];
void interc(unsigned long l,unsigned long m,unsigned long r)
{
unsigned long i,j,t,k,b[100];
for(i=1; i<=r; i++)
b[i]=a[i];
i=l;
j=m+1;
k=l;
while(i<=m && j<=r)
if(b[i]>b[j])
a[k++]=b[j++];
else
a[k++]=b[i++];
for(t=i; t<=m; t++)
a[k++]=b[t];
for(t=j; t<=r; t++)
a[k++]=b[t];
}
void mergesort(unsigned long l,unsigned long r)
{
unsigned long m;
if(l==r) return;
m=(l+r)/2;
mergesort(1,m);
mergesort(m+1,r);
interc(l,m,r);
}
int main()
{
freopen("algsort.in","r",stdin);
freopen("algsort.out","w",stdout);
unsigned long i;
scanf("%lu",&n);
for(i=1; i<=n; i++) scanf("%lu",&a[i]);
mergesort(1,n);
for(i=1; i<=n; i++) printf("%lu ",a[i]);
return 0;
}