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Cod sursa(job #503615)
#include <iostream>
#include <stdio.h>
#include <algorithm>
#include <vector>
int a[500010],n,i;
void interclas(int i,int m,int j)
{int b[500010];
int x=i;
int k=1;
int y=m+1;
while(x<=m && y<=j)
if (a[x]<a[y])
b[k++]=a[x++];
else
b[k++]=a[y++];
while (x<=m)
b[k++]=a[x++];
while (y<=j)
b[k++]=a[y++];
int t=i;
for (k=1;k<=(j-i)+1;k++)
a[t++]=b[k];
}
void divimp(int i,int j)
{if (i<j)
{int m=(i+j)/2;
divimp(i,m);
divimp(m+1,j);
interclas(i,m,j);}
}
int main()
{
freopen("algsort.in","r",stdin);
freopen("algsort.out","w",stdout);
scanf("%d",&n);
for(i=1;i<=n;i++)
scanf("%d",&a[i]);
divimp(1,n);
for(i=1;i<=n;i++)
printf("%d ",a[i]);
return 0;
}