---
# System prepended metadata

title: 題目示範的範本

---

# 題目示範的範本
# Zerojude 題目範例
### a005: Eva 的回家作業
https://zerojudge.tw/ShowProblem?problemid=a005
> ## 題目:
> #### 　############題目內文###################
> ## 輸入說明:
> #### ############輸入說明###################
> ## 輸出說明:
> #### ############輸入說明###################
> ## 想法:
> #### 對於等差與等比數列$a_{i}$與$a_{i+1}$的公差or公比皆相等，故可以用if做簡易的判斷。
> ## C++程式碼
```c=
#include <iostream>
using namespace std;
int main(){
	int n;
	cin >> n;
	while(n--){
		int a,b,c,d;
		cin >> a >> b >> c >> d;
		if(d/c==c/b&&c/b==b/a)
			cout << a << " " << b << " " << c << " " << d << " " << d*d/c;
		else
			cout << a << " " << b << " " << c << " " << d << " " << d+(d-c);
                /* d/c == c/b && c/b == b/a ? cout << a << " " << b << " " << c << " " << d << " " << d*d/c : cout << a << " " << b << " " << c << " " << d << " " << d+(d-c); */
	cout << '\n';
	}
return 0;
}
```