How can you efficiently solve a problem with a time complexity of n log n?

To efficiently solve a problem with a time complexity of n log n, you can use algorithms like merge sort or quicksort. These algorithms have a time complexity of n log n, which means they can sort a list of n elements in a time proportional to n multiplied by the logarithm of n. This allows for faster and more efficient problem-solving compared to algorithms with higher time complexities.