CodilityのTrainingを解いてみた その

問題 TapeEquilibrium

• 使用言語：Swift3

ソースコード

public func solution3_3(_ A : inout [Int]) -> Int {
        if A.count == 2 {
            return abs(A[0] - A[1])
        }
        var sum = 0
        for i in 0...A.count - 1 {
            sum = sum + A[i]
        }

        var pMns = A[0]
        var pPls = sum - pMns
        var minDif = abs(pPls - pMns)
        for i in 1...A.count - 2 {
            pMns = pMns + A[i]
            pPls = sum - pMns
            let dif = abs(pPls - pMns)
            if dif - minDif < 0 {
                minDif = dif
            }
        }
        return minDif
    }