why it is showing running out of time while sorting in codechef

#include<iostream>
#include<algorithm>
using namespace std;
int main()
{
   int n;
   cin>>n;
   cout<<endl;
   int* a;
   a=new int [n];

   for(int i=0; i<n;>
    {cin>>a[i];
}
sort(a,a+n);
for(int i=0; i<n;>
{
   cout<<a[i]<<endl;
}
return 0;
}</algorithm></iostream>