Create number-of-students-unable-to-eat-lunch.py

Author: kamyu104

Python/number-of-students-unable-to-eat-lunch.py

@@ -0,0 +1,21 @@
+# Time:  O(n)
+# Space: O(1)
+
+import collections
+
+
+class Solution(object):
+    def countStudents(self, students, sandwiches):
+        """
+        :type students: List[int]
+        :type sandwiches: List[int]
+        :rtype: int
+        """
+        count = collections.Counter(students)
+        for i, s in enumerate(sandwiches):
+            if not count[s]:
+                break
+            count[s] -= 1
+        else:
+            i = len(sandwiches)
+        return len(sandwiches)-i