Help me in solving DJ2 problem

My issue

I have written correct answer than also compiler is not giving my solution correct, i have also check my solution with ide solution my solution and ide solution was matching correctly than also the compiler is giving my solution wrong . which i have written with my own using my mind instead of copying and pasting. And why it is happening with me in this project ?? please check your compiler.

My code

// your code goes here

Learning course: Projects using HTML / CSS
Problem Link: Get the heading Practice Problem in Projects using HTML / CSS - CodeChef