Mathematics. In my experience, ability to program complex algos comes from the complexity of your maths background. Find a way to do more maths and you'll get

Mathematics. In my experience, ability to program complex algos comes from the complexity of your maths background. Find a way to do more maths and you'll get better at algos. (abstract/logic maths, not just simple number crunching). Also, building "pet" projects helps, since you'll know exactly what you want as an end product of an algo.