Check if a given number is Fancy - GeeksforGeeks

Check if a given number is Fancy - GeeksforGeeks

Check if a given number is Fancy

A fancy number is one which when rotated 180 degrees is the same. Given a number, find whether it is fancy or not.

180 degree rotations of 6, 9, 1, 0 and 8 are 9, 6, 1, 0 and 8 respectively

Examples:

Input:  num =  96  Output: Yes  If we rotate given number by 180, we get same number    Input:  num =  916  Output: Yes  If we rotate given number by 180, we get same number    Input:  num =  996  Output: No    Input:  num =  121  Output: No  

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The idea is to create a map to store fancy pair mappings. After creating map, traverse given number from both ends and if at any point characters at current ends are not fancy pairs, return false. This algorithm is similar to palindrome check algorithm.

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