def main():
    line = raw_input()
    tokens = line.split()
    nums = [int(t) for t in tokens]
    out = doProblems(nums)
    print out

def doProblems(nums):
    z = float(nums[2])/100 * nums[0] - nums[1]
    if z != int(z):
        z += 1
    return int(z) 
main()
		      	  		 	 			 	  				  		