Create Find All Possible Recipes from Given Supplies.java

Author: varunu28

Medium/Find All Possible Recipes from Given Supplies.java

@@ -0,0 +1,30 @@
+class Solution {
+  public List<String> findAllRecipes(String[] recipes, List<List<String>> ingredients,
+      String[] supplies) {
+    Map<String, Set<String>> ingredientToRecipeMap = new HashMap<>();
+    Map<String, Integer> recipeToIngredientCount = new HashMap<>();
+    for (int i = 0; i < recipes.length; i++) {
+      String recipe = recipes[i];
+      List<String> ingredientsForRecipe = ingredients.get(i);
+      recipeToIngredientCount.put(recipe, ingredientsForRecipe.size());
+      for (String ingredient : ingredientsForRecipe) {
+        ingredientToRecipeMap.computeIfAbsent(ingredient, k -> new HashSet<>()).add(recipe);
+      }
+    }
+    Queue<String> queue = new LinkedList<>(List.of(supplies));
+    Set<String> result = new HashSet<>();
+    while (!queue.isEmpty()) {
+      String ingredient = queue.remove();
+      for (String dependentRecipe : ingredientToRecipeMap.getOrDefault(ingredient,
+          new HashSet<>())) {
+        recipeToIngredientCount.put(dependentRecipe,
+            recipeToIngredientCount.get(dependentRecipe) - 1);
+        if (recipeToIngredientCount.get(dependentRecipe) == 0) {
+          result.add(dependentRecipe);
+          queue.add(dependentRecipe);
+        }
+      }
+    }
+    return new ArrayList<>(result);
+  }
+}