Minimum Prefix Concatenation to Form Target String | C++ Dynamic Programming Solution

In this video, we solve the problem of finding the minimum number of valid prefixes from a given list of words that can be concatenated to form a target string. We use an efficient **C++ Dynamic Programming approach** with prefix precomputation for fast lookups.
You will learn:

* How to precompute all valid prefixes efficiently
* How to use DP to solve string concatenation problems
* How to handle edge cases where the target cannot be formed

**Example Cases Covered:**
1️⃣ words = \["abc", "aaaaa", "bcdef"], target = "aabcdabc" → Output: 3
2️⃣ words = \["abababab", "ab"], target = "ababaababa" → Output: 2
3️⃣ words = \["abcdef"], target = "xyz" → Output: -1

📌 **Time Complexity:** O(N²) in worst case (optimized by prefix lookup)
📌 **Space Complexity:** O(N + total\_prefixes)
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Видео Minimum Prefix Concatenation to Form Target String | C++ Dynamic Programming Solution канала Coding theory