#include <cstdio>
#include <algorithm>
using namespace std;
int main()
{int n,v[500001],i;
 freopen("algsort.in","r",stdin);
 freopen("algsort.out","w",stdout);
 scanf("%d",&n);
 for (i=0;i<n;++i) scanf("%d",&v[i]);
 sort(v,v+n);
 for (i=0;i<n;++i) printf("%d",v[i]);
 return 0;}