import java.util.*;
 
public class Main {
    public static void main(String[] args) throws Exception {
Scanner sc=new Scanner(System.in);
int a=sc.nextInt();
int b[] =new int[a];
long e=0;
String c[] =new String[a];
for(int i=1;i<a+1;i++){
b[i-1]=i;
}
for(int i=1;i<a+1;i++){
    c[i-1]=String.valueOf(b[i-1]);
            if(b[i-1]%15==0){
        c[i-1]="FizzBuzz";
    }
    if(b[i-1]%3==0){
        c[i-1]="Fizz";
    }
        if(b[i-1]%5==0){
        c[i-1]="Buzz";
    }

}
for(int i=0;i<a;i++){
    if(c[i]=="FizzBuzz"||c[i]=="Fizz"||c[i]=="Buzz"){
    }else{
        e+=Integer.parseInt(c[i]);
    }
    }
    System.out.println(e);
}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz