سوال

https://www.codechef.com/problems/CIELAB

 

https://www.codechef.com/problems/LTM40AB

 

http://codeforces.com/problemset/problem/626/A

 

http://codeforces.com/problemset/problem/109/A

 

http://codeforces.com/problemset/problem/626/B