/*
#include <stdio.h>
int main ()
{
int a,b,c,d,e,f,i,j;
scanf("%x",&a);
for(i=1; i<=15; i++)
{
printf("%X*%X=%X\n",a,i ,a*i);
}
}
*/
#include <stdio.h>
int main ()
{
int i,n,a,sum=0;
scanf ("%d",&n);
for (i=1;1<=n;i++)
{
sum+=i;
if (sum+i<=n){
printf("%d",i);
}
printf("%d",)
}
}