import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sn = new Scanner(System.in);
        
        long n = sn.nextLong();
        long sum = 0;
        
        for(long i = 1; i <= n; i++) {
            if((i % 3) == 0 || (i % 5) == 0 || (i % 15) == 0) {
            } else {
                sum += i;
            }
        }
        
        System.out.print(sum);
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sn = new Scanner(System.in);
        
        long n = sn.nextLong();
        long sum = 0;
        
        for(long i = 1; i <= n; i++) {
            if((i % 3) == 0 || (i % 5) == 0 || (i % 15) == 0) {
            } else {
                sum += i;
            }
        }
        
        System.out.print(sum);
    }
} Main public static void main(String[] args) throws Exception {
        Scanner sn = new Scanner(System.in);
        
        long n = sn.nextLong();
        long sum = 0;
        
        for(long i = 1; i <= n; i++) {
            if((i % 3) == 0 || (i % 5) == 0 || (i % 15) == 0) {
            } else {
                sum += i;
            }
        }
        
        System.out.print(sum);
    } main {
        Scanner sn = new Scanner(System.in);
        
        long n = sn.nextLong();
        long sum = 0;
        
        for(long i = 1; i <= n; i++) {
            if((i % 3) == 0 || (i % 5) == 0 || (i % 15) == 0) {
            } else {
                sum += i;
            }
        }
        
        System.out.print(sum);
    } Scanner sn = new Scanner(System.in); sn new Scanner(System.in) long n = sn.nextLong(); n sn.nextLong() sn.nextLong sn long sum = 0; sum 0 for(long i = 1; i <= n; i++) {
            if((i % 3) == 0 || (i % 5) == 0 || (i % 15) == 0) {
            } else {
                sum += i;
            }
        } long i = 1; long i = 1; i 1 i <= n i n i++ i++ i {
            if((i % 3) == 0 || (i % 5) == 0 || (i % 15) == 0) {
            } else {
                sum += i;
            }
        } {
            if((i % 3) == 0 || (i % 5) == 0 || (i % 15) == 0) {
            } else {
                sum += i;
            }
        } if((i % 3) == 0 || (i % 5) == 0 || (i % 15) == 0) {
            } else {
                sum += i;
            } (i % 3) == 0 || (i % 5) == 0 || (i % 15) == 0 (i % 3) == 0 || (i % 5) == 0 || (i % 15) == 0 (i % 3) == 0 (i % 3) i 3 0 (i % 5) == 0 (i % 5) i 5 0 (i % 15) == 0 (i % 15) i 15 0 {
            } {
                sum += i;
            } sum += i sum i System.out.print(sum) System.out.print System.out System System.out sum String[] args args public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sn = new Scanner(System.in);
        
        long n = sn.nextLong();
        long sum = 0;
        
        for(long i = 1; i <= n; i++) {
            if((i % 3) == 0 || (i % 5) == 0 || (i % 15) == 0) {
            } else {
                sum += i;
            }
        }
        
        System.out.print(sum);
    }
} public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sn = new Scanner(System.in);
        
        long n = sn.nextLong();
        long sum = 0;
        
        for(long i = 1; i <= n; i++) {
            if((i % 3) == 0 || (i % 5) == 0 || (i % 15) == 0) {
            } else {
                sum += i;
            }
        }
        
        System.out.print(sum);
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sn = new Scanner(System.in);
        
        long n = sn.nextLong();
        long sum = 0;
        
        for(long i = 1; i <= n; i++) {
            if((i % 3) == 0 || (i % 5) == 0 || (i % 15) == 0) {
            } else {
                sum += i;
            }
        }
        
        System.out.print(sum);
    }
}
