#include <iostream>
#include <vector>
#include <iostream>
#include <complex>
using namespace std;
int main() {
// your code goes here
std::vector<std::complex<double>> vec1 { std::complex<double>(1., 2.),
std::complex<double>(3., 4.) };
printf("%f %f\n", vec1[0].real(), vec1[0].imag());
printf("%f %f\n", vec1[1].real(), vec1[1].imag());
return 0;
}
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