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    import java.util.Scanner;
    class MyCalculator {
        /*
        * Create the method long power(int, int) here.
        */
        public static  int power(int n , int p) throws Exception{
                if(n == 0 && p== 0){
                    throw new Exception("n and p should not be zero.");
                }
                else if(n < 0 || p < 0){
                    throw new Exception("n or p should not be negative.");
                } 
                else{
                    return (int) Math.pow(n, p);
                }            
        }
        
    }