I am feeling weak in bitmask problem. I am facing the problem "How to think actually!!".. Could anyone help me ??
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Auto comment: topic has been updated by rayhanSakib (previous revision, new revision, compare).
Can you provide the link to the problem ?
Understand the concept of bitwise AND, OR and XOR. Then try to visualize them. Practice in pen-paper like 23 OR 39 = ?, 67 XOR 34 = ?, 24 AND 18 = ? ..... Then try solving some bitmask problems of your level.
Additional : Watch some basic bitmask problem tutorial in YT it will make things easier for you.
Note : There is a typo in you blog. I think it will be "bitmask problems" instead of "bitmask problem" fix it otherwise it will give people wrong idea.