Testing

test.go

package main

import (
	"fmt"
	"sort"
)

func transform(nums []int) []int {
	// Aquí quizás verificar que el input sea de 10, o de números pares?

	evens, odds := make([]int, 0, 5), make([]int, 0, 5)
	for _, n := range nums {
		if n%2 == 0 {
			evens = append(evens, n)
		} else {
			odds = append(odds, n)
		}
	}

	// Sort de pares e impares
	sort.Sort(sort.Reverse(sort.IntSlice(evens))) // desc
	sort.Ints(odds)                               // asc

	// Sumar
	out := make([]int, 5)
	for i := 0; i < 5; i++ {
		out[i] = evens[i] + odds[i]
	}
	return out
}

func main() {
	fmt.Println(transform([]int{10, 11, 48, 16, 43, 29, 58, 33, 46, 5}))
	fmt.Println(transform([]int{48, 8, 25, 37, 27, 43, 45, 12, 30, 30}))
	fmt.Println(transform([]int{47, 32, 5, 49, 37, 60, 13, 40, 38, 22}))
}