#include <stdio.h>
#include <string.h>
int main(void)
{
int n;
scanf("%d",&n);
char a[60][10000]={'\0'};
int count=1;
a[0][0]='1';
for(int i=0;i<n;i++)
{
char b[10000]={'\0'};
for(int k=0,j=1;a[i][j-1]!='\0';j++)
{
if(a[i][j]==a[i][j-1])
{
count++;
}
else
{
b[k++]=count + '0';
b[k++]=a[i][j-1];
count=1;
}
}
strcpy(a[i+1],b);
}
printf("%s",a[n]);
}