9. 44.super stairs

   def stairs(n):
       return (n==1 or n==2) and 1 or (stairs(n-1)+stairs(n-2))
   
   print(stairs(3))
   

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10. 43.The Fibonacci sequence

    a=[1,1]
    for i in range(2,n):
        a.append(a[i-2]+a[i-1])
    print a[n-1]%20132013
    

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11. 42.Splitting the prime Numbers sum

    n=10
    
    def isPrime(n):
        if n <= 1:
            return False
        for i in range(2, n):
            if n % i == 0:
                return False
        return True
    
    count = 0
    for i in range(2,n):
        if isPrime(i) and isPrime(n-i):
            count += 1
    print count/2
    

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12. 41.Py

    n=2992
    def py(n,m):
        total = 0
        while n>0:
            total+=n%m
            n=n/m
        return total
    print py(n,10)==py(n,16)==py(n,12) and "Yes" or "No"
    

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13. 40.Integer solutions

    a=8
    b=15
    x=a ** 2 - 4 * b
    print x>=0 and x**0.5==int(x**0.5) and "YES" or "NO"
    

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14. 38.Simple list of conversion

    L=['abc','d','efg']
    
    print "".join([x for x in L])
    

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15. 37.pythagorean theorem

    a=3
    b=4
    
    print "%.3f" % (a**2+b**2)**0.5
    

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16. 36.Maximum not continuous subsequence

    L = [2, -3, 3, 50]
    
    for i in range(2,len(L)):
        L[i]=(max(max(L[0:i-1]),0)+L[i])
    
    print max(L)
    

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17. 35.Maximum continuous subsequence

    maxim=0
    sum=0
    for i in range(len(L)):
        if L[i]<0:
            maxim=max(sum,maxim)
            sum=0
        else:
            sum+=L[i]
    
    print max(sum,maxim) # don't forget the last one
    

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18. 34.The password generated

    a = 1
    b = 77
    x = 1
    y = 14
    
    lister, ans, a = [], [], a%b*10
    while a not in lister:
        lister.append(a)        # 1. not includes x of x.123456
        ans.append(a // b)
        a = (a % b)*10
    
    nolooplen = lister.index(a) # when the iteration appears in ans
    looplen = len(ans ...

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