fix #3: fix document

yosupo06 · yosupo06 · commit 7522f8c2bb7c · 2020-09-11T22:25:36.000+09:00
diff --git a/document_en/maxflow.md b/document_en/maxflow.md
@@ -48,6 +48,7 @@ It adds an edge oriented from the vertex `from` to the vertex `to` with the capa
 
 **@{keyword.constraints}**
 
+- $s \neq t$
 - The answer should be in `Cap`.
 
 **@{keyword.complexity}**
diff --git a/document_ja/maxflow.md b/document_ja/maxflow.md
@@ -49,6 +49,7 @@ int graph.add_edge(int from, int to, Cap cap);
 
 **@{keyword.constraints}**
 
+- $s \neq t$
 - 帰り値が `Cap` に収まる
 
 **@{keyword.complexity}**
