Cod sursa(job #855824)
Utilizator | Data | 15 ianuarie 2013 17:58:38 | |
---|---|---|---|
Problema | Sortare prin comparare | Scor | 100 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 1.71 kb |
#include<cstdio>
#include<cstdlib>
#define MAXN 500001
int a[MAXN];
void Merge(int st,int mij, int dr)
{
int i,j,k,c[MAXN];
i=st;
j=mij+1;
k=st;
while((i<=mij)&&(j<=dr))
{
if(a[i]<a[j])
{
c[k]=a[i];
i++;
}
else if(a[i]>a[j])
{
c[k]=a[j];
j++;
}
else
{
c[k++]=a[i];
c[k]=a[j];
i++;
j++;
}
k++;
}
while(i<=mij)
{
c[k]=a[i];
k++;
i++;
}
while(j<=dr)
{
c[k]=a[j];
k++;
j++;
}
for(i=st;i<=dr;i++)
a[i]=c[i];
return;
}
void MergeSort(int st,int dr)
{
int mij=(st+dr)/2;
if(st<dr)
{
MergeSort(st,mij);
MergeSort(mij+1,dr);
}
Merge(st,mij,dr);
return;
}
int main()
{
freopen("algsort.in","r",stdin);
freopen("algsort.out","w",stdout);
int i,n;
scanf("%d",&n);
for(i=1;i<=n;i++)
scanf("%d",&a[i]);
MergeSort(1,n);
for(i=1;i<=n;i++)
printf("%d ",a[i]);
return 0;
}