When adding and subtracting numbers it's important to be consistent with positive and negative values. Remember that two plus signs or two minus signs make a positive.

Installing your home security system yourself can save you hundreds of dollars. These are the best DIY options, with and without professional monitoring.

The CodeChef IDE lets you code right in your browser, making it easy to start practicing with their problem sets. Understanding time and memory limits is key; your code needs to be both fast and ...