import UIKit

var arr: [Int64] = [1,29,3,23,5]
var min = arr.reduce(0) { (result, element) -> Int64 in
    if element != arr[0]  {
        return result + element
    } else {
        return result
    }
}
var max = min
var temp: Int64
for i in 1..<arr.count {
    temp = arr.reduce(0) { (result, element) -> Int64 in
        if element != arr[i]  {
            return result + element
        } else {
            return result
        }
    }
    if min > temp {
        min = temp
    } else if max < temp {
        max = temp
    }
}

print("max sum of 4 element is: \(max), min sum of 4 element is: \(min)")