Hackerrank , 30 Days of Code Challenges ( Day 6-9 Solutions)

Day 6: Let's Review  :
# Enter your code here. Read input from STDIN. Print output to STDOUT
t=input()
for i in range(0,t):
    string =raw_input()
    print ''.join([string[i] for i in range(0,len(string),2)])+" "+''.join([string[i] for i in range(1,len(string),2)])

Day 7: Arrays   :
#!/bin/python
import sys
n = int(raw_input().strip())
arr = map(int,raw_input().strip().split(' '))
arr.reverse()
print " ".join(str(i) for i in arr)

Day 8: Dictionaries and Maps     :
# Enter your code here. Read input from STDIN. Print output to STDOUT
t=input()
data=dict()
index=[]
for i in range(0,t):
    array=raw_input().split(" ")
    data[array[0]]=array[1]
for k in range(0,t):
    inp= raw_input()
    if data.has_key(inp):
        print inp+"="+data[inp]
    else:
        print "Not found"

Day 9: Recursion    :
n= input()
def factorial(n):
    if n ==0 or n==1 :
        return 1
    else:
        return n*factorial(n-1)
print factorial(n)