upload to gh

src/day1/BTBFS.ts

@@ -0,0 +1,16 @@
+export default function bfs(head: BinaryNode<number>, needle: number): boolean {
+  const q: (BinaryNode<number>|null)[] = [head];
+  while(q.length){
+    const curr = q.shift() as BinaryNode<number> | undefined | null;
+    
+    if(!curr){
+      continue;
+    }
+    if (curr.value === needle){
+      return true;
+    }
+    q.push(curr.left);
+    q.push(curr.right);
+  }
+  return false;
+}