Adding readme file

Author: bugsweeper

118-Pascal'sTriangle/README.md

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+Given an integer numRows, return the first numRows of Pascal's triangle.
+
+In Pascal's triangle, each number is the sum of the two numbers directly above it as shown:
+
+ 
+Example 1:
+Input: numRows = 5
+Output: [[1],[1,1],[1,2,1],[1,3,3,1],[1,4,6,4,1]]
+Example 2:
+Input: numRows = 1
+Output: [[1]]
+
+ 
+Constraints:
+
+
+	1 <= numRows <= 30
+