20250424
# a=list(map(int,input().split()))
# a.pop(a.index(max(a)))
# print(max(a)*min(a))
# n=int(input())
# for i in range(n):
# p,m=map(int,input().split())
# a=[0 for i in range(m)]
# s=0
# for j in range(p):
# k=int(input())
# if a[k-1]==1:
# s=s+1
# a[k-1]=1
# print(s)
# def dp(x):
# global a
# if x==1:
# return 1
# elif x==2:
# return 2
# elif a[x]==0:
# a[x]=dp(x-2)+dp(x-1)
# return a[x]
# n=int(input())
# a=[0 for i in range(n+1)]
# print(dp(n)%10007)
def bs():
global n,m,s
l=0
r=n
while l<r:
c=l+(r-l)//2
d=m+c
if s==int(d/(n+c)*100//1):
l=c+1
else:
r=c-1
print(l,c,r)
print(d/(n+c)*100//1)
if s==int(d/(n+c)*100//1):
return c+1
else:
return c
n,m=map(int,input().split())
s=int(m/n*100//1)
ans=bs()
if ans==n+1:
ans=-1
print(ans)