Companies are using people's browsing and buying history to set individualized prices on everything from groceries to plane ...

Loyalty programs aren’t new. Marketers have been dangling points, perks and vaguely attainable “Gold Status” tiers in front of consumers since frequent-flyer lounges still had fax machines, writes ...

Understand the problem first: Read the question carefully, identify inputs, outputs, and constraints before writing any code to avoid confusion and mistakes. Break complex problems into small steps: ...