a=input()
i=0
maxi=-1
pos=0
while i<len(a):
f=1
temp=0
k=i+1
if a[i]=='0':
i+=1
continue
while a[i]>='0' and a[i]<='9':
f=0
temp=temp*10+int(a[i])
i+=1
if i>=len(a):
break

if temp>maxi and f==0:
maxi=temp
pos=k
i+=1
print(pos)