#include<stdio.h>
int main(){
double s;
int n,i;
s=1;
scanf("%d",&n);
for(i=n;i>=1;i--){
s=s*(1+1.0/i);
}
printf("%.1f",s);
return 0;
}
#include <stdio.h>
int main(void)
{
int n = 0;
scanf("%d", &n);
printf("%.1lf", (double)(n + 1));
return 0;
}