For the "almostIncreasingSequence" problem on CodeFights:

AlmostIncreasingSequence.swift

func almostIncreasingSequence(sequence: [Int]) -> Bool {
    let count = sequence.count
    if count < 3 {
        return true
    }
    if sequence.sorted() == sequence {
        return isStrictlyAscending(array: sequence)
    }
    
    var mutableSequence = sequence
    
    for i in 0..<sequence.count {
        let value = mutableSequence.remove(at: i)
        if isStrictlyAscending(array: mutableSequence) {
            return true
        }
        mutableSequence.insert(value, at: i)
    }
    
    return false
}

func isStrictlyAscending(array: [Int]) -> Bool {
    guard array.count > 1 else { return true }
    var strictlyAscending = true
    var last = array.first!
    for i in 1..<array.count {
        let current = array[i]
        if current <= last {
            strictlyAscending = false
            break
        }
        last = current
    }
    return strictlyAscending
}