### My issue

I have issue with this question, i will write the approach here please help me to solve the problem: from itertools import *

for _ in range(int(input())):

n = int(input())

s = set(map(int,input().split()))

l =

for i in range(1,n+1):

l.append(combinations(s,i))

sum1 = 0

for i in l:

for j in i:

sum1 += max(j) - min(j)

print(sum1)

It gives run time error

### My code

```
# cook your dish here
```

Problem Link: SETDIFF Problem - CodeChef