import sys
input = sys.stdin.readline

N=int(input())

ANS=0

for p in range(2,10):
    r=p*p-1
    count=0

    for a in range(min(p,10)-1,-1,-1):
        for b in range(min(p,10)-1,-1,-1):
            if a==b:
                continue
            if N*(a*p+b)>r:
                count+=1
    ANS+=count

#print(ANS)

for a in range(10):
    for b in range(10):
        if a==b:
            continue

        OK=1
        NG=2*10**9
                        
        while NG>OK+1:
            mid=(OK+NG)//2

            if N*(a*mid+b)>(mid*mid-1):
                OK=mid
            else:
                NG=mid

        #print(a,b,OK)

        if OK>=10:
            ANS+=OK-10+1

print(ANS)