Bisection search w Python'ie

l=0;
h=100;
guess=50;

ans=raw_input('Input a number from <0-100>');
print('Is your secret number ' + str(guess) + '? ')
ans=raw_input('Input h if number is too high, l if too low and c if correct');

while ans!="c":
    if ans =="h":
        guess=(guess+l)/2
        print('Is your secret number  ' + str(guess) + '? ')
        ans=raw_input('Enter "h" to indicate the guess is too high. ' +
        'Enter "l" to indicate the guess is too low. ' +
        'Enter "c" to indicate I guessed correctly. ')
    elif ans=="l":
        guess=(guess+h)/2
        print('Is your secret number  ' + str(guess) + '? ')
        ans=raw_input('Enter "h" to indicate the guess is too high. ' +
        'Enter "l" to indicate the guess is too low. ' +
        'Enter "c" to indicate I guessed correctly. ')
    elif not(ans in["l","h"]):
        print('Sorry, I did not understand your input.')
        print('Is your secret number  ' + str(guess) + '? ')
        ans=raw_input('Enter "h" to indicate the guess is too high. ' +
        'Enter "l" to indicate the guess is too low. ' +
        'Enter "c" to indicate I guessed correctly.')
    
print "Game over. Your secret number was: "+str(guess)

print('Think of a number between 0 and 100!')

hi=100
lo=0

guessed=False

while not guessed:
    guess=(hi + lo)/2
    print('Is  your number '+str(guess)+'?')
    ans=raw_input('H if too high,L if too low and C if correct')

    if ans=='h':
        hi=guess
    elif ans=='l':
        lo=guess
    elif ans=='c':
        guessed=True
        print('This is your number '+str(guess)+'.')