feat: Add stack

kHarshit · kHarshit · commit cc34ea1e86d9 · 2017-09-14T01:27:55.000+05:30
diff --git a/README.md b/README.md
@@ -41,6 +41,8 @@ The project contains following problems:
 30. To implement breadth-first search.
 31. To implement depth-first search.
 
+32. To implement a stack.
+
 *IN production...
 
 Note: Most of the above programs can be run directly from the command line.
diff --git a/stack.py b/stack.py
@@ -0,0 +1,27 @@
+class Stack:
+    def __init__(self):
+        self.items = []
+
+    def push(self, item):
+        return self.items.append(item)
+
+    def pop(self):
+        return self.items.pop()
+
+    def is_empty(self):
+        return self.items == []
+
+    def size(self):
+        return len(self.items)
+
+
+s = Stack()
+s.push(54)
+s.push(45)
+s.push('+')
+print(s.size())
+print(s.pop())
+s.push(True)
+
+while not s.is_empty():
+    print(s.pop(), end=' ')
