Python Basics簡単

Reverse of a number

Detailed guide and Python implementation for the 'Reverse of a number' problem.

問題提起

簡単

Write a function reverse_number(n) that takes a non-negative integer n and returns the integer formed by reversing its digits. Leading zeros in the reversed result should be dropped (e.g., reversing 100 gives 1).

制約
  • 0 <= n <= 10^9

Example 1
Input
n = 1234
Output
4321
Explanation

Reversing the digits of 1234 gives 4321.

Example 2
Input
n = 100
Output
1
Explanation

Reversing 100 gives 001, which is 1 as an integer.

Example 3
Input
n = 5
Output
5
Explanation

A single digit reversed is itself.

Need a Hint?
Consider using Basics-specific data structures like sets or heaps.
Edge Cases to Watch
  • Empty input structures
  • Single element inputs
  • Large numerical bounds

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