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package main
func Sum(numbers []int) int {
sum := 0
for _, number := range numbers {
sum += number
}
return sum
}
func SumAll(numbers ...[]int) []int {
var sums []int
for _, numbers := range numbers {
sums = append(sums, Sum(numbers))
}
return sums
}
func SumAllTails(numbers ...[]int) []int {
var sums []int
for _, numbers := range numbers {
if len(numbers) == 0 {
sums = append(sums, 0)
} else {
tail := numbers[1:]
sums = append(sums, Sum(tail))
}
}
return sums
}
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