CONVSTR getting tle

[guddu_rangbaaz]

Problem: CodeChef: Practical coding for everyone
My solution: WVVIy6 - Online C++0x Compiler & Debugging Tool - Ideone.com

[bhavitjain11]

Getting WA

can anybody tell me on which test case it is failing.

https://www.codechef.com/viewsolution/33502259