From edffce704d1e64deeea402e5e717b6deefd0374e Mon Sep 17 00:00:00 2001
From: Xie Yuheng <xyheme@gmail.com>
Date: Sun, 7 Jul 2024 19:43:34 +0800
Subject: [PATCH] up

---
 TODO.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/TODO.md b/TODO.md
index 1dc3224..538e7b7 100644
--- a/TODO.md
+++ b/TODO.md
@@ -3,6 +3,8 @@
 `conceptBeneath` -- 为 layout 做准备
 `conceptCover` -- 为 layout 做准备
 
+找出 lattice 中的所有最长 chain -- 为计算 rank 做准备
+
 # lattice layout
 
 `LatticeLayout`