Challenging Problems Involving Stacks (Data Structures)
Does anyone know where I can get lots of challenging programming problems that involve the use of stacks. I've been taking a data structures course and I'm really enjoying it, so I'll like to challenge myself with super hard problems. I've found that most sites just list programing problems without stating the topic that is required to come up with a solution (at least one solution) and so, it's not easy to master a particular topic in isolation of others. I've been learning about stacks so I'll like to solve problems that involve only stacks. I'll be very grateful if you can help me with this.

Thanks.

Challenging Problems Involving Stacks (Data Structures)
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Does anyone know where I can get lots of challenging programming problems that involve the use of stacks. I've been taking a data structures course and I'm really enjoying it, so I'll like to challenge myself with super hard problems. I've found that most sites just list programing problems without stating the topic that is required to come up with a solution (at least one solution) and so, it's not easy to master a particular topic in isolation of others. I've been learning about stacks so I'll like to solve problems that involve only stacks. I'll be very grateful if you can help me with this.

Thanks.
