Merge pull request #47 from raywted75/master

Fix mistakes in the example

src/sorting/counting_sort/README.md

@@ -69,14 +69,14 @@ Prefix Sum: 0 0 1 3 3 3 4 4 4 5
 +--------+--------+--------+--------+--------+--------+
 
 (2, D)
---> prefix sum 為 2，寫入 array[4]，並將 prefix sum + 1
+--> prefix sum 為 1，寫入 array[1]，並將 prefix sum + 1
 
 +--------+--------+--------+--------+--------+--------+
 | (1, A) | (2, D) |        | (5, B) | (8, C) |        |
 +--------+--------+--------+--------+--------+--------+
 
 (2, E)
---> prefix sum 為 3（前一步驟 + 1），寫入 array[3]，並將 prefix sum + 1
+--> prefix sum 為 2（前一步驟 + 1），寫入 array[2]，並將 prefix sum + 1
 
 +--------+--------+--------+--------+--------+--------+
 | (1, A) | (2, D) | (2, E) | (5, B) | (8, C) |        |