ladder.swift

gistfile1.txt

func findLadder(columns : Int, upperArray : [Int]) -> Int {
    var changeNum = 0
    
    var changableArray = upperArray
    
    for i in 0..<changableArray.count{
        for j in (i + 1)..<changableArray.count {
            
            if changableArray[i] > changableArray[j]{
                var temp = changableArray[i]
                changableArray[i] = changableArray[j]
                changableArray[j] = temp
                print("\(i+1) - \(j+1)")
                changeNum += 1
            }
        }
    }
    
    return changeNum
}

print(findLadder(columns: 4, upperArray: [4,1,3,2]))