fileprivate struct Scanner {
    private var elements = [String]()
    private var index = 0
    
    mutating func peek() -> String {
        while elements.count == index {
            elements = readLine()!.split(separator: " ").map(String.init)
            index = 0
        }
        return elements[index]
    }
    
    mutating func next() -> String {
        let value = peek()
        index += 1
        return value
    }
    
    mutating func nextInt() -> Int {
        return Int(next())!
    }
    
    mutating func nextDouble() -> Double {
        return Double(next())!
    }
}

func main() {
    var scanner = Scanner()
    let N = scanner.nextInt()
    let D = scanner.nextInt()
    let X = (0 ..< N).map { _ in scanner.nextInt() }
    let V = (0 ..< N).map { _ in scanner.nextInt() }
    
    let sumV = V.reduce(0, +)
    let answer = (D + sumV - 1) / sumV
    print(answer)
}

main()