public/subjects/findmissingnumber/README.md

find-missing-number

Instructions

Write a function that takes an array of numbers and returns the missing number.

• If the array is empty, return -1.
• If the array contains only one number or there is no missing number, return -1.
• if the array contains more than one missing number, return the minimum missing number.

Expected function

func FindMissingNumber(numbers []int) int {
    // Your code here
}

Usage

Here is a possible program to test your function:

package main

import "fmt"

func main(){
    fmt.Println(FindMissingNumber([]int{1, 2, 5,3, 6, 7, 8, 9, 10}))
    fmt.Println(FindMissingNumber([]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}))
    fmt.Println(FindMissingNumber([]int{-10,12,32})
}

and the output should be:

$ go run .
4
-1
-9