n=int(input())
i=1
s=0
for i in range(1,n+1):
    if i%6==0 or i%10==0 or i%14==0 or i%15==0 or i%21==0 or i%35==0:
        s+=i
        i+=1
print(s)
/**************************************************************
	Problem: 1449
	User: admin
	Language: Python
	Result: Accepted
	Time:279 ms
	Memory:34480 kb
****************************************************************/