#!/usr/bin/env python3

from decimal import *

dn = 103

getcontext().prec = dn

def sumdigs(x):
    r = 0
    while x:
        r, x = r + x % 10, x // 10
    return r

def sumsquare(x):
    sq = Decimal(x).sqrt()
    return sumdigs(int((sq) * 10**(dn - 1)) // 1000)

sm = 0

for i in range(2, 101):
    x = sumsquare(i) 
    sm += x if x >10 else 0    

print(sm)