Create 2115-find-all-possible-recipes-from-given-supplies.js

Author: everthis

2115-find-all-possible-recipes-from-given-supplies.js

@@ -0,0 +1,40 @@
+/**
+ * @param {string[]} recipes
+ * @param {string[][]} ingredients
+ * @param {string[]} supplies
+ * @return {string[]}
+ */
+const findAllRecipes = function(recipes, ingredients, supplies) {
+  const set = new Set(supplies), res = [], graph = {}, n = recipes.length
+  const inDegree = {}
+  for(let x of recipes) inDegree[x] = 0
+  for(let i = 0; i < n; i++) {
+    for(let j = 0; j < ingredients[i].length; j++) {
+      const ing = ingredients[i][j]
+      if(!set.has(ing)) {
+        if (graph[ing] == null) graph[ing] = []
+        graph[ing].push(recipes[i])
+        inDegree[recipes[i]]++
+      }
+    }
+  }
+  // Kahn's Algorithm
+  const q = []
+  for(let x in inDegree) {
+    if (inDegree[x] === 0) q.push(x)
+  }
+  while(q.length) {
+    const len = q.length
+    for(let i = 0; i < len; i++) {
+      const cur = q.pop()
+      res.push(cur)
+      for(let next of (graph[cur] || [])) {
+        inDegree[next]--
+        if(inDegree[next] === 0) {
+          q.push(next)
+        }
+      }
+    }
+  }
+  return res
+};