def curious(x, primes):
# First, check right truncation
val = x
for i in range(euler_util.length(x) - 1):
val = rtrunc(val)
if euler_util.bsearch(primes, val) == -1:
return False
# next, check left truncation
val = x
for i in range(euler_util.length(x) - 1):
val = ltrunc(val)
if euler_util.bsearch(primes, val) == -1:
return False
return True
def run():
count = 0
for p in range(1,22):
for x in eu.numbers(1):
l = eu.length(pow(x,p))
if l > p:
break
if l == p:
count += 1
return count
def topheavy(num, den):
return eu.length(num) > eu.length(den)