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#include<stdio.h>
#include<malloc.h>
#include<iostream>
#include<math.h>
#include<stack>
#include<string>
#include<map>
#include<algorithm>
#include<complex>
using namespace std;
int main(){
double a1,b1,a2,b2;
char op;
while(cin>>a1>>b1>>a2>>b2>>op){
complex<double> num1(a1,b1);
complex<double> num2(a2,b2);
complex<double> out;
if(op=='+')
out = num1+num2;
if(op=='*')
out = num1*num2;
printf("%.1lf %.1lf\n",out.real(),out.imag());
&n...
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