Getting WA in case number 2. Do anyone know what is test #2???? Please help.

This problem is very easy. Just try to think a little bit.

I am having some problem with input 10 10. One is starting from left side another is starting from right side. Can they shot 10 can each???? What should I do??

Can you send me some easy problem list for solving. I wanna build up my confidence. Will you help me???

1 2 3 4 5 6 7 8 9 x 9 8 7 6 5 4 3 2 1

The ans for 10 10 is 9 9.