-
Notifications
You must be signed in to change notification settings - Fork 0
/
fractional_knapsack.py
41 lines (38 loc) · 1.51 KB
/
fractional_knapsack.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
import functools
def pick_items(knapsack_items, prices, waights, capacity_of_knapsack):
def compare(item1, item2):
choise_factor1 = prices[item1] / waights[item1]
choise_factor2 = prices[item2] / waights[item2]
if choise_factor1 >= choise_factor2:
return -1
else:
return 1
final_price = 0
knapsack_items = sorted(knapsack_items, key=functools.cmp_to_key(compare))
print(knapsack_items)
input("\n----press enter to pick items----")
for i in knapsack_items:
if capacity_of_knapsack == 0: break
if capacity_of_knapsack - waights[i] > 0:
final_price += prices[i]
print(f"{i} : 100%")
capacity_of_knapsack-=waights[i]
else:
portion_size = (capacity_of_knapsack * 100) / waights[i]
print(f"{i} : {portion_size}%")
final_price += (capacity_of_knapsack/waights[i]) * prices[i]
capacity_of_knapsack-=(capacity_of_knapsack/waights[i])
print("\nTotal max cost : ", final_price)
return final_price
if __name__ == "__main__":
knapsack_items = []
prices = {}
waights = {}
n = int(input("Enter number of items : "))
for i in range(n):
name = input("Enter item name : ")
knapsack_items.append(name)
prices[name], waights[name] = int(input("Enter item price : ")), int(
input("Enter waight : "))
capacity = int(input("Enter capacity of Knapsack : "))
pick_items(knapsack_items, prices, waights, capacity)