<ul><li>The problem is to find the next higher number of the given input number using the same digits.</li><li>The problem can be solved using a brute force approach, direct solution, or by using an inbuilt function.</li><li>The direct solution involves finding two pointers, swapping the numbers, and sorting the array.</li><li>It is also possible to solve the problem using the 'next_permutation()' function in the C++ STL.</li></ul>

Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers.

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