25 lines
372 B
Go
25 lines
372 B
Go
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package missing
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import "fmt"
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func FindNumber(A []int) int {
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var elements_sum int
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for i := 0; i < len(A); i++ {
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if A[i] < 0 || A[i] > 100000 {
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fmt.Print("array has negative element or longer than expected")
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return A[i]
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} else {
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elements_sum = elements_sum + A[i]
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}
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}
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nums_sum := (len(A) + 1) * (len(A) + 2) / 2
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return nums_sum - elements_sum
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}
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