5. Sum first and last
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Input
Goal output
Your output
❌
[2,8,8,8,3]
5
3
❌
[4,4]
8
4
❌
[1,2,3]
4
3
❌
[7,0,5,7]
14
7
❌
[8,4,2,1,0]
8
0
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