added .gitignore
commit first sample
commit sample2
commit sample3
commit sample4
Merge branch 'master' of github.com:JinGyeong-Jeong/Challengers3 into smksyj
Merge branch 'smksyj' of github.com:JinGyeong-Jeong/Challengers3 into smksyj
added controller for problem list
added test code for controller
controller test code success