a005: Eva 的回家作業 FYI: https://yunlinsong.blogspot.com/2016/01/eva.html

a005.cpp

#include <iostream>
using namespace std;

int main() {	
	short t;
	cin >> t;
    while(t-- > 0){
		int a, b, c, d, e, r;
		cin >> a >> b >> c >> d;
		
		r = b - a;
		if( d == a + 3*r )
		{
			e = a + 4 * r;
		}
		else
		{
			r = b / a;
			r = r * r;
			r = r * r;
			e = a * r;
		}

		cout << a << " " << b << " "
			 << c << " " << d << " "
			 << e << endl;

    }
    return 0;
}