Time: 25 ms (58.17%), Space: 13.4 MB (66.30%) - LeetHub

2026-06-13 03:27:07 +00:00 · 2022-07-15 22:57:06 -04:00
parent c83e49259a
commit 88a80d94fc
1 changed files with 3 additions and 0 deletions
@@ -17,11 +17,14 @@ class Solution(object):
        
        combos = [""]
        for d in digits:
+            # Build upon last set 
            comsToAdd = []
            for l in numToLetters[int(d)]:
                for combo in combos:
                    comsToAdd.append(combo + l)
+            # Replace old set with new, longer combos
            combos = comsToAdd
        
+        # Return blank array if no string was added
        return [] if combos == [""] else combos