class Calculator {
    fun calculate(operation: String, a: Int, b: Int): Int {
        var result = 0
        if (operation == "add") {
            result = a + b
        } else if (operation == "subtract") {
            result = a - b
        } else if (operation == "multiply") {
            result = a * b
        } else if (operation == "divide") {

            /**
            AUTO GENERATED COMMENT
            Mutation Operator: AssignmentReplacementOperator
            Line number: 20
            Id: 7d99bafd-300e-4fb0-9527-524b808763f6,
            Old Operator: =,
            New Operator: +=
            */
            result += a / b
        }
        var i = 0
        while (i < 10) {
            if (i % 2 == 0) {
                result += i
            } else {
                result -= i
            }
            i++
        }
        for (j in 1..5) {
            result *= j
        }
        return result
    }

    fun simpleFun(): Int? {
        var test:String? = null
        var result:Int? = test!!.length
        return result
    }
}