Leetcode 10: regular expression matching

January 26, 2018

Introduction

It is another 8:00 PM mock interview. The peer is top ranking computer science master student, and she helped me to work on the dynamic programming solution of Leetcode 10: regular expression matching. First time after I practiced over 5 times on mock interview, I wrote a dynamic programming solution and passed all test cases.

Code review

Here is the C# code.

Highlights of changes in mock interview discussion advised by the peer. I told the peer that she paid so expensive tuition as an international student, and spent half hour to help me and tutor me to work on dynamic programming solution, I am so appreciated her help. She also thanked me to give her advice as well.

1. Line 15, change dp data type from int to bool;
2. Line 32, add i - 2 >= 0 in case index-out-of-range error;
3. line 39, use row, col variable instead textIndex, patternIndex;
4. line 50, remove dp[row, col] = 0 since the peer told me the default value is 0;
5. line 58, need to change dp data type from integer to bool, otherwise the expression is too hard to read.

Follow up 

May 9, 2019

Here is the code I wrote and fixed the issue and passed online judge.