## Challenges

Reddit challenges in python language.

Files Code and Result

### challenge234_easy

```''' I see that no [Hard] challenge was posted last week, the moderator had some challenges with getting away. Hopefully an [Easy] challenge makes up for it.
Description

A vampire number v is a number v=xy with an even number n of digits formed by multiplying a pair of n/2-digit numbers (where the digits are taken from the original number in any order) x and y together. Pairs of trailing zeros are not allowed. If v is a vampire number, then x and y are called its "fangs."

EDIT FOR CLARITY Vampire numbers were original 2 two-digit number (fangs) that multiplied to form
a four digit number. We can extend this concept to an arbitrary number of two digit numbers.
For this challenge we'll work with three two-digit numbers (the fangs) to create six digit
numbers with the same property - we conserve the digits we have on both sides of the equation.

Additional information can be found here: http://www.primepuzzles.net/puzzles/puzz_199.htm
Input Description

Two digits on one line indicating n, the number of digits in the number to factor and find
if it is a vampire number, and m, the number of fangs. Example:

4 2

Output Description

A list of all vampire numbers of n digits, you should emit the number and its
factors (or "fangs"). Example:

1260=21*60
1395=15*93
1435=41*35
1530=51*30
1827=87*21
2187=27*81
6880=86*80

Challenge Input

6 3

Challenge Input Solution

114390=41*31*90
121695=21*61*95
127428=21*74*82
127680=21*76*80
127980=20*79*81
137640=31*74*60
163680=66*31*80
178920=71*90*28
197925=91*75*29
198450=81*49*50
247680=40*72*86
294768=46*72*89
376680=73*60*86
397575=93*75*57
457968=56*94*87
479964=74*94*69
498960=99*84*60
'''

n = 2
m = 4
sett = set()

for x in range(10, 99):
for y in range(10, 98):
vamp = x * y
if len(str(vamp)) == m:
if sorted(str(x) + str(y)) == sorted(str(vamp)):
# check for duplicates
if (x,y) in sett:
continue
else:
print('{0}{1}{2}{3}{4}'.format(vamp, '=', x, '*', y))
```

### Result

```1395=15*93
1260=21*60
1827=21*87
2187=27*81
1530=30*51
1435=35*41
6880=80*86
```