import java.util.*; public class Main { public static void main(String[] args) { Scanner sc=new Scanner(System.in); String op=sc.next(); double a=sc.nextDouble(); double b=sc.nextDouble(); double c=sc.nextDouble(); double d=sc.nextDouble(); double sum1=0,sum2=0; if(op.equals("+")){ sum1=a+c; sum2=b+d; } else if(op.equals("-")){ sum1=a-c; sum2=b-d; } else if(op.equals("*")){ sum1=a*c-b*d; sum2=a*d+b*c; } else{ double p=c*c+d*d; sum1=(a*c+b*d)/p; sum2=(-a*d+b*c)/p; } System.out.printf("%.2f+%.2fi\n",sum1,sum2); } }
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