feat: update solutions to lc problem: No.0743

No.0743.Network Delay Time

Author: yanglbme

Diff for: README.md

@@ -111,9 +111,11 @@
 -   [由单个字符重复的最长子字符串](/solution/2200-2299/2213.Longest%20Substring%20of%20One%20Repeating%20Character/README.md) - 线段树、动态最大子段和模型
 -   [矩形面积 II](/solution/0800-0899/0850.Rectangle%20Area%20II/README.md) - 线段树、离散化、扫描线
 
-<!-- 待补充
 ### 5. 图论
 
+-   [网络延迟时间](/solution/0700-0799/0743.Network%20Delay%20Time/README.md) - 最短路、Dijkstra 算法、Bellman Ford 算法、SPFA 算法
+
+<!-- 待补充
 ### 6. 数学知识
  -->
 

Diff for: README_EN.md

@@ -107,9 +107,11 @@ Complete solutions to [LeetCode](https://leetcode.com/problemset/all/), [LCOF](h
 -   [Longest Substring of One Repeating Character](/solution/2200-2299/2213.Longest%20Substring%20of%20One%20Repeating%20Character/README_EN.md) - Segment Tree
 -   [Rectangle Area II](/solution/0800-0899/0850.Rectangle%20Area%20II/README_EN.md) - Segment Tree, Discretization, Line Sweep
 
-<!--
 ### 5. Graph Theory
 
+-   [Network Delay Time](/solution/0700-0799/0743.Network%20Delay%20Time/README_EN.md) - Shortest Path, Dijkstra, Bellman Ford, SPFA
+
+<!--
 ### 6. Mathematical Knowledge
  -->