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

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