#include <iostream>
#include <cmath>
using namespace std;
double f1(double x,double y){
return log(x*y);
}
double f2(double x,double y){
return abs(x)+cos(x*y);
}
int main() {
double x,y;
int n;
cin>>n;
for (int i=0;i<n;i++){
cout<<"\n--"<<i<<"--\n";
cout<<"meaning of x"<<endl;
cin>>x;
cout<<"meaning of y"<<endl;
cin>>y;
if(x*y>0){
cout<<"meaning of f1:"<<f1(x,y)<<"\n";
}
else { cout<<"undefined";
}
int smth=f2(x,y);
cout<<"meaning of f2:"<<smth<<"\n";
if(smth*y>0){
int smth1=f1(smth,y);
cout<<"new meaning:"<<smth1<<"\n";
}
else { cout<<"undefined";
}
}
return 0;
}
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