m=int(input("m="))
n=int(input("n="))
if m>n:
        m,n=n,m
s=0
txt=""
for i in range(m,n+1):
        if i%3==0 and i%5==0:
                s+=i
                #txt+=str(i)+"+"
#print(txt[:-1],"=",s)
print("s=",s)