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 = z + 1
    if z < 0:
        z = 0
    return int(z) 
main()
    	     		  				  	       	