مهندسی نرم افزار و کارگاه عمومی

##x = 16

##ans = 0

##if x>=0:

##    while ans*ans

##        ans = ans + 1

####    print 'ans =', ans

##    if ans * ans !=x:

##        print x,'is not a perfect square!'

##    else: print ans

##else: print x , 'is a negative number'

##def sqrt(x):

##    ''' return the squre root of x, if x is a perfect

##    square. print the error message and return None otherwise '''

##

##    ans = 0

##    if x>=0:

##        while ans*ans

##            ans = ans + 1

##        

##        if ans * ans !=x:

##            print x,'is not a perfect square!'

##            return None

##        else: return ans

##    else:

##        print x , 'is a negative number'

##        return None

##

#### local binding vs global binding

##def f(x):

##    x = x+1

##    return x

##def solve(numHeads,numLegs):

##    for numChicks in range(0,numHeads + 1):

##        numSheeps = numHeads - numChicks

##        totLegs = 4*numSheeps + 2* numChicks

##        if totLegs == numLegs:

##            return[numSheeps,numChicks]

##    return [None,None]

##

##def barnYard():

##    heads = int(raw_input('Enter number of heads: '))

##    legs = int(raw_input('Enter number of legs: '))

##    sheeps, chickens = solve(heads,legs)

##    if sheeps==None:

##        print 'your problem is not solvable!'

##    else:

##        print 'Number of sheeps:',sheeps

##        print 'Number of chicks:',chickens

##

##

##

##def solve1(numHeads,numLegs):

##    for numChicks in range(0,numHeads + 1):

##        for numSheeps in range(0,numHeads-numChicks+1):

##            numSpiders = numHeads - numChicks - numSheeps

##            totLegs = 6*numSpiders + 4*numSheeps + 2* numChicks

##            if totLegs == numLegs:

##                return[numSheeps,numChicks,numSpiders]

##    return [None,None,None]

##def barnYard1():

##    '''return nothing and gets nothing'''

##    heads = int(raw_input('Enter number of heads: '))

##    legs = int(raw_input('Enter number of legs: '))    

##    sheeps, chickens, spiders = solve1(heads,legs)

##    if sheeps==None:

##        print 'There is no solution!'

##    else:

##        print 'Number of sheeps:',sheeps

##        print 'Number of chicks:',chickens

##        print 'Number of spiders:',spiders

####    solve2(legs,heads)

##

##def solve2(numLegs,numHeads):

##    solutionFound = False

##    for numChicks in range(0,numHeads + 1):

##        for numSheeps in range(0,numHeads-numChicks+1):

##            numSpiders = numHeads - numChicks - numSheeps

##            totLegs = 6*numSpiders + 4*numSheeps + 2* numChicks

##            if totLegs == numLegs:

##                print 'Number of sheeps:',numSheeps

##                print 'Number of chicks:',numChicks

##                print 'Number of spiders:',numSpiders

##                solutionFound = True            

##    if not solutionFound: print 'There is no solution'

##

##

##def integral(n):

##    sum = 0

##    for i in range(1,n+1):

##        sum +=i

##    return sum

##

##def integral2(n):

##    if n==1:

##        return(1)

##    else:

##        return integral2(n-1)+n

##

##

def isPalindrome(s):

    '''return True if s is palindrome and False otherwise'''

    if len(s)<=1: return True

    else: return s[0]==s[-1] and isPalindrome(s[1:-1])

##

##

##def fib(x):

##    if x ==0 or x ==1: return(x)

##    else: return fib(x-1) + fib(x-2)