Hack my hashing function. Input can only have digits (0-9), anything else is treated as a 0. Hashing functions are meant to take in some data and output a fixed-length piece of data, with a very small chance of collision (two different inputs mapping to the same hash) (collision is inevitable unless the hash output length is always longer than the input, but we normally just make the chance very VERY small) A small change in the input should lead to the output changing dramatically. Hash functions are used for verifying data integrity (as checksums), making IDs, and numerous other things. Can you find an easy way to calculate an input that produces a specific hash? Can you easily find two values that map to the same hash?
