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

Author: chetannada

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

@@ -0,0 +1,25 @@
+/**
+ * @param {number[]} students
+ * @param {number[]} sandwiches
+ * @return {number}
+ */
+var countStudents = function (students, sandwiches) {
+    let movement = 0; // initialize movement to be zero
+
+    while (sandwiches.length > 0) { // while length of sandwiches is greater than zero
+        if (students[0] == sandwiches[0]) { // if first element of students and sandwiches both are same
+            students.shift(); // reomve first element of students using shift()
+            sandwiches.shift(); // remove first element of sandwiches using shift()
+            movement = 0; // make movement to be zero
+        } else { // else
+            let add = students.shift(); // initialize add to be first element of students
+            students.push(add); // push add to array students
+            movement++; // increment movement
+            if (movement == students.length) { // if movement is equal to length of students then break the loop
+                break;
+            }
+        }
+    }
+
+    return students.length; // return length of array students
+};