Mar 21

Author: siddydutta

2025-03-March-LeetCoding-Challenge/Find All Possible Recipes from Given Supplies.py

@@ -0,0 +1,53 @@
+from collections import defaultdict, deque
+
+
+class Solution:
+    def findAllRecipes(
+            self, recipes: list[str], ingredients: list[list[str]], supplies: list[str]
+    ) -> list[str]:
+        supplies = set(supplies)
+        graph = defaultdict(set)  # ingredient -> recipes
+        in_degree = defaultdict(int)  # recipe ->  in-degree
+        queue = deque()
+
+        for recipe, ingredient in zip(recipes, ingredients):
+            not_available = 0
+            for i in ingredient:
+                if i not in supplies:
+                    not_available += 1
+                    graph[i].add(recipe)
+            if not_available == 0:
+                queue.append(recipe)
+            else:
+                in_degree[recipe] = not_available
+
+        result = []
+        while queue:
+            recipe = queue.popleft()
+            result.append(recipe)
+            for neighbour in graph[recipe]:
+                in_degree[neighbour] -= 1
+                if in_degree[neighbour] == 0:
+                    queue.append(neighbour)
+        return result
+
+
+def main():
+    recipes = ['bread']
+    ingredients = [['yeast', 'flour']]
+    supplies = ['yeast', 'flour', 'corn']
+    assert Solution().findAllRecipes(recipes, ingredients, supplies) == ['bread']
+
+    recipes = ['bread', 'sandwich']
+    ingredients = [['yeast', 'flour'], ['bread', 'meat']]
+    supplies = ['yeast', 'flour', 'meat']
+    assert Solution().findAllRecipes(recipes, ingredients, supplies) == ['bread', 'sandwich']
+
+    recipes = ['bread', 'sandwich', 'burger']
+    ingredients = [['yeast', 'flour'], ['bread', 'meat'], ['sandwich', 'meat', 'bread']]
+    supplies = ['yeast', 'flour', 'meat']
+    assert Solution().findAllRecipes(recipes, ingredients, supplies) == ['bread', 'sandwich', 'burger']
+
+
+if __name__ == '__main__':
+    main()

2025-03-March-LeetCoding-Challenge/README.md

@@ -24,7 +24,7 @@
 | March 18 | [2401. Longest Nice Subarray](https://leetcode.com/problems/longest-nice-subarray/) | Medium | Unsolved |
 | March 19 | [3191. Minimum Operations to Make Binary Array Elements Equal to One I](https://leetcode.com/problems/minimum-operations-to-make-binary-array-elements-equal-to-one-i/) | Medium | Solved |
 | March 20 | [3108. Minimum Cost Walk in Weighted Graph](https://leetcode.com/problems/minimum-cost-walk-in-weighted-graph/) | Hard | Unsolved |
-| March 21 | []() |  |  |
+| March 21 | [2115. Find All Possible Recipes from Given Supplies](https://leetcode.com/problems/find-all-possible-recipes-from-given-supplies/) | Medium | Unsolved |
 | March 22 | []() |  |  |
 | March 23 | []() |  |  |
 | March 24 | []() |  |  |
@@ -41,5 +41,5 @@
 | Level  | Problems | Solved | Unsolved |
 | ---    | --- | --- | --- |
 | Easy   | 6 | 6 | 0 |
-| Medium | 13 | 6 | 7 |
+| Medium | 14 | 6 | 8 |
 | Hard   | 1 | 0 | 1 |