Create 1700-number-of-students-unable-to-eat-lunch.js

Author: everthis

1700-number-of-students-unable-to-eat-lunch.js

@@ -0,0 +1,35 @@
+/**
+ * @param {number[]} students
+ * @param {number[]} sandwiches
+ * @return {number}
+ */
+const countStudents = function(students, sandwiches) {
+  const n = students.length
+  let res = n
+  while(helper(students, sandwiches)) {
+      const len = students.length
+      for(let i = 0; i < len; i++) {
+        if (students[0] === sandwiches[0]) {
+          students.shift()
+          sandwiches.shift()
+          res--
+        } else {
+          const tmp = students[0]
+          students.shift()
+          students.push(tmp)
+        }
+      }
+  }
+  return res
+};
+
+function helper(stu, san) {
+  const n = stu.length
+  let res = false
+  for(let i = 0; i < n; i++) {
+    if (stu[i] === san[0]) {
+      return true
+    }
+  }
+  return res
+}