I saw that some people use trie structure using linked list by pointer while other people built that linked list using array. My question is which approach is more efficient.
I saw that some people use trie structure using linked list by pointer while other people built that linked list using array. My question is which approach is more efficient.
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The array is much faster in most cases,
But sometimes the array need a huge space in comparison with the pointer approach, Look at this problem on Spoj Link
You may get MemoryLimitExceeded if you solve this problem using array in some online judges.