Introduction to algorithms.

Introduction to algorithms.

1. Definition

   • step-by-step procedure for solving a problem or accomplishing some end.

2. Examples

   • Add a new contact
   • Organize a party
   • Upload a photo to Instagram

3. Characteristics

   • Precision
     • steps are precisely stated
   • Uniqueness
     • depend on the input and the result of the preceding steps
     • results of each step are uniquely defined
   • Finiteness
     • algorithm stops after a finite number of instructions are executed
   • Input
     • the algorithm receives input
   • Output
     • the algorithm produces output