Update README.

trekhleb · trekhleb · commit 58d83e57cb9f · 2018-05-19T10:34:22.000+03:00
diff --git a/README.md b/README.md
@@ -36,6 +36,9 @@ the data.
 
 ## Algorithms
 
+Algorithm is an unambiguous specification of how to solve a class of problems. Algorithm is
+a set of rules that precisely defines a sequence of operations.
+
 ### Algorithms by Topic
 
 * **Math**
