def readarray(f): return map(f, raw_input().split())
def readint(): return int(raw_input())
def printlist(l): print ' '.join(map(str, l))

n, x, y = readarray(int)

req = (n*y)/100
if (n*y)%100 != 0:
  req += 1
print max(0, req - x)
