POJ-1658

#include<iostream>
using namespace std;

bool isSubstraction(int a, int b, int c, int d){
if(b-a==c-b &&
d-c==c-b){
return true;
}else{
return false;
}
}

int main(int argc, char *argv[]){
int cnt;
cin>>cnt;

for(int i=0;i<cnt;i++){
int num1, num2, num3, num4;
cin>>num1>>num2>>num3>>num4;

if(isSubstraction(num1,num2,num3,num4)){
cout<<num1<<" "<<num2<<" "<<num3<<" "<<num4<<" "<<2*num4-num3<<endl;
}else{
cout<<num1<<" "<<num2<<" "<<num3<<" "<<num4<<" "<<num4*num4/num3<<endl;
}
}

return 0;
}