【Latex】分类讨论

之前一直不知道下面这种东西的标准写法:
$$
\begin{equation}
\text{最终得分} =
\begin{cases}
\text{所有操作的分数之和}, & F=0\\
\left \lfloor \frac{\text{所有操作的分数之和}}{2^d} \right \rfloor, & F=1
\end{cases}
\end{equation}
$$

现在知道了:
\begin{equation}
\text{最终得分} =
\begin{cases}
\text{所有操作的分数之和}, & F=0\\\\
\left \lfloor \frac{\text{所有操作的分数之和}}{2^d} \right \rfloor, & F=1
\end{cases}
\end{equation}

参考资料:http://uoj.ac/problem/4

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