Find max value of sub set of 3 values from a list of integers.

input: List<Integer> values;

return: [ x, y ]

where:

x - sum value and

y - subset index

Given data: [1,2,5,87,1]

1+2+5 = 8 (subset 0)

2+5+87 = 94 (subset 1)

5+85+1 = 91 (subset 2)

//eg:
values = [1,2,5,87,1, ...more]

//return: 
[94, 1]