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Python/dynamic_programming/Fractional_Knapsack.py at all-permutations · Sathis/Python · GitHub
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dynamic_programming
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Fractional_Knapsack.py
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Python
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dynamic_programming
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Fractional_Knapsack.py
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from
itertools
import
accumulate
from
bisect
import
bisect
def
fracKnapsack
(
vl
,
wt
,
W
,
n
):
r
=
list
(
sorted
(
zip
(
vl
,
wt
),
key
=
lambda
x
:
x
[
0
]
/
x
[
1
],
reverse
=
True
))
vl
,
wt
=
[
i
[
0
]
for
i
in
r
],[
i
[
1
]
for
i
in
r
]
acc
=
list
(
accumulate
(
wt
))
k
=
bisect
(
acc
,
W
)
return
0
if
k
==
0
else
sum
(
vl
[:
k
])
+
(
W
-
acc
[
k
-
1
])
*
(
vl
[
k
])
/
(
wt
[
k
])
if
k
!=
n
else
sum
(
vl
[:
k
])
print
(
"%.0f"
%
fracKnapsack
([
60
,
100
,
120
],[
10
,
20
,
30
],
50
,
3
))
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