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Algorithms for Coding Interviews in Python/

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Useful Formulas

Useful Formulas

In this lesson, we'll study some mathematical formulas that make calculating time complexity easier!

We'll cover the following...

Formulas

Here is a list of handy formulas which can be helpful when calculating the time complexity of an algorithm:

Summation Equation
(∑i=1nc)=c+c+c+⋯+c\left(\sum_{i=1}^n c \right) = c + c+ c + \cdots + c cncn
(∑i=1ni)=1+2+3+⋯+n\left(\sum_{i=1}^n i \right) = 1+2+3+\cdots+n n(n+1)2
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