## DATA SOURCE (1 for file, 0 for std input)
opt = 0
src = opt and open("input", "r") or None

def gvals(source, format = int, separator = ' '):
	if source:
		a = map(format, source.readline().split(separator))
	else:
		a = map(format, raw_input().split(separator))
	return a

def gval(source, format = int):
	if source:
		a = format(source.readline())
	else:
		a = format(raw_input())
	return a

n, x, y = gvals(src)
need = (n*y)/100.
#print need
if int(need)!=need:
	need = int(need)+1
else:
	need = int(need)
print max(0, need-x)

