Word Break II (all possible sentences)?

Short answer: List<string> WordBreak(string s, IList<string> wordDict) {

Example code

var wordSet = new HashSet<string>(wordDict);
var memo = new Dictionary<int, List<string>>();
return DFS(0);
List<string> DFS(int start) {
if (memo.ContainsKey(start)) return memo[start];
var res = new List<string>();
if (start == s.Length) { res.Add(""); return res;
}
for (int end = start + 1; end <= s.Length; end++) {
string word = s.Substring(start, end - start);
if (wordSet.Contains(word)) {
foreach (var sub in DFS(end)) {
string space = sub.Length == 0 ? "" : " "; res.Add(word + space + sub); }
}
}
memo[start] = res;
return res;
}
} Follow on:

Real-world example (ShopNest)

In coding rounds, state complexity aloud, write a clear ShopNest-flavored example (orders, carts), then handle edge cases (empty list, null, overflow).

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.