Initial Commit & Pull Request

.vscode/settings.json

@@ -0,0 +1,4 @@
+{
+    "python.linting.pylintEnabled": false,
+    "python.formatting.provider": "black"
+}

knapsack.py

@@ -3,11 +3,35 @@
 import sys
 from collections import namedtuple
 
-Item = namedtuple('Item', ['index', 'size', 'value'])
 
+Item = namedtuple('Item', ['index', 'size', 'value', 'ratio'])
+
+# okay so let's try to implement the brute-force version
+# I don't know why but I keep going in circles with this one
+# 
+
+
+
+# greedy version--seems to work
 def knapsack_solver(items, capacity):
-  # !!!! IMPLEMENT ME
-  pass
+    items_sorted_by_ratios = (sorted(items, key=lambda x: x.ratio))
+    knapsack = []
+    total_value = 0
+    total_weight = 0
+    avail_weight = capacity
+
+    for i in reversed(items_sorted_by_ratios):
+        if i.size <= avail_weight:
+          knapsack.append(i)
+          avail_weight -= i.size
+          total_value += i.value
+          total_weight += i.size
+    knapsack.append(['total value: ', total_value])
+    knapsack.append(['total weight: ', total_weight])
+    return knapsack
+
+
+
 
 if __name__ == '__main__':
   if len(sys.argv) > 1:
@@ -18,9 +42,11 @@ def knapsack_solver(items, capacity):
 
     for line in file_contents.readlines():
       data = line.rstrip().split()
-      items.append(Item(int(data[0]), int(data[1]), int(data[2])))
+      items.append(Item(int(data[0]), int(data[1]), int(data[2]), int(data[2]) / int(data[1])))
 
     file_contents.close()
-    print(knapsack_solver(items, capacity))
+    print("Here are the contents of your knapsack: ")
+    for i in knapsack_solver(items, capacity):
+      print(i)
   else:
     print('Usage: knapsack.py [filename] [capacity]')