Editorial for Số gấp đôi
Remember to use this editorial only when stuck, and not to copy-paste code from it. Please be respectful to the problem author and editorialist.
Submitting an official solution before solving the problem yourself is a bannable offence.
Submitting an official solution before solving the problem yourself is a bannable offence.
Spoiler Alert
Approach 1
- Dùng phép cộng: \(result = x + x\)
Approach 2
- Dùng phép nhân: \(result = 2 * x\)
Approach 3
- Dùng phép bitwise: \(result = (x << 1)\)
Comments