Hi everybody,
Unfortunately a lot of  programmers failed in ( 65A:  Harry Potter and Three Spells ) :( :( .
Really it was very tricky problem. the problem statement is easy. but the point here is to cover all possible cases.
anyhow, I failed pass it during the contest. many thanks to those who hacked me ;)
I love this type of problems so much , and I think each round should contain at least one problem of that type.
waiting ur comments :)......

By the way: I brought another tricky&crazy problem from SPOJ .here it is :

Problem Statement :    ( No Problem Statement )

Input: 
10
123
8209

Output:
1
0
4
.....................................................................................................
waiting ur Solutions. ;)
best wishes for allllllll :)