diff --git a/TangDou/AcWing/Math/GameTheory/1319.cpp b/TangDou/AcWing_TiGao/T5/GameTheory/1319.cpp
similarity index 100%
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index 0e8c8c4..17ae03b 100644
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@@ -47,15 +47,16 @@ win
 
 例：$mex({1,2})=0,mex({0,1})=2,mex({0,1,2,4})=3$
 
-在一张有向无环图中，对于每个点 $u$，设其**所有能到的点**的 $SG$ 函数值集合为集合 $A$，那么 $u$ 的 $SG$ 函数值为 $mex(A)$，记做 $SG(u)=mex(A)$
-例图：
+在一张有向无环图中，对于每个点 $u$，设其 **所有能到的点** 的 $SG$ 函数值集合为集合 $A$，那么 $u$ 的 $SG$ 函数值为 $mex(A)$，记做 $SG(u)=mex(A)$
+
+如图：
 <center><img src='https://cdn.acwing.com/media/article/image/2020/06/25/30334_2388c086b6-%E6%97%A0%E6%A0%87%E9%A2%98.png'></center>
 
 例图解释：
 $SG(5)=mex({\phi})=0$
 $SG(3)=mex({SG(5)})=mex({0})=1$
 $SG(4)=mex({SG(5),SG(3)})=mex({0,1})=2$
-$SG(2)=mex({SG(3)}=mex({1})=0$
+$SG(2)=mex({SG(3)})=mex({1})=0$
 $SG(1)=mex({SG(2),SG(4)})=mex({0,2})=1$
 
 #### 本题思路
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