The problem link is : B level And it passes 20 tests but fails on 21st. In an online compiler "CODE" works fine, for the same test case, by failure I mean RUNTIME_ERROR. Any help would be appreciated. The same code first failed at test case 26th, which i noticed was due to less allocated memory when I tripled the allocated space, it fails at 21st case which gives correct output in the other compiler.

Thanks