ConnectSticks.swift

func connectSticks(_ sticks: [Int]) -> Int {
    let sticks = sticks.sorted()
    var connSticks = [Int]()
    
    var stick = sticks[0]+sticks[1]
    connSticks.append(stick)
    
    for i in 2..<sticks.count {
        stick = stick + sticks[i]
        connSticks.append(stick)
    }
    
    let res = connSticks.reduce(0, +)
    return res
}

let arr = [2,4,3]
let val = connectSticks(arr)
print(val)