From cf246d9ccc3deb2276414b2d3ffba4e04eb8ed87 Mon Sep 17 00:00:00 2001
From: yanglbme <szuyanglb@outlook.com>
Date: Fri, 11 Jul 2025 06:56:28 +0800
Subject: [PATCH] feat: add rust solution to lc problem: No.3169

No.3169.Count Days Without Meetings
---
 .../README.md                                 | 23 +++++++++++++++++++
 .../README_EN.md                              | 23 +++++++++++++++++++
 .../Solution.rs                               | 18 +++++++++++++++
 3 files changed, 64 insertions(+)
 create mode 100644 solution/3100-3199/3169.Count Days Without Meetings/Solution.rs

diff --git a/solution/3100-3199/3169.Count Days Without Meetings/README.md b/solution/3100-3199/3169.Count Days Without Meetings/README.md
index 62d0f4d43c51d..cc2ea2020497e 100644
--- a/solution/3100-3199/3169.Count Days Without Meetings/README.md	
+++ b/solution/3100-3199/3169.Count Days Without Meetings/README.md	
@@ -183,6 +183,29 @@ function countDays(days: number, meetings: number[][]): number {
 }
 ```
 
+#### Rust
+
+```rust
+impl Solution {
+    pub fn count_days(days: i32, mut meetings: Vec<Vec<i32>>) -> i32 {
+        meetings.sort_by_key(|m| m[0]);
+        let mut ans = 0;
+        let mut last = 0;
+
+        for e in meetings {
+            let st = e[0];
+            let ed = e[1];
+            if last < st {
+                ans += st - last - 1;
+            }
+            last = last.max(ed);
+        }
+
+        ans + (days - last)
+    }
+}
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->
diff --git a/solution/3100-3199/3169.Count Days Without Meetings/README_EN.md b/solution/3100-3199/3169.Count Days Without Meetings/README_EN.md
index 5373d1f894693..f2b12970df9e6 100644
--- a/solution/3100-3199/3169.Count Days Without Meetings/README_EN.md	
+++ b/solution/3100-3199/3169.Count Days Without Meetings/README_EN.md	
@@ -181,6 +181,29 @@ function countDays(days: number, meetings: number[][]): number {
 }
 ```
 
+#### Rust
+
+```rust
+impl Solution {
+    pub fn count_days(days: i32, mut meetings: Vec<Vec<i32>>) -> i32 {
+        meetings.sort_by_key(|m| m[0]);
+        let mut ans = 0;
+        let mut last = 0;
+
+        for e in meetings {
+            let st = e[0];
+            let ed = e[1];
+            if last < st {
+                ans += st - last - 1;
+            }
+            last = last.max(ed);
+        }
+
+        ans + (days - last)
+    }
+}
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->
diff --git a/solution/3100-3199/3169.Count Days Without Meetings/Solution.rs b/solution/3100-3199/3169.Count Days Without Meetings/Solution.rs
new file mode 100644
index 0000000000000..e46e8fd7b4ce6
--- /dev/null
+++ b/solution/3100-3199/3169.Count Days Without Meetings/Solution.rs	
@@ -0,0 +1,18 @@
+impl Solution {
+    pub fn count_days(days: i32, mut meetings: Vec<Vec<i32>>) -> i32 {
+        meetings.sort_by_key(|m| m[0]);
+        let mut ans = 0;
+        let mut last = 0;
+
+        for e in meetings {
+            let st = e[0];
+            let ed = e[1];
+            if last < st {
+                ans += st - last - 1;
+            }
+            last = last.max(ed);
+        }
+
+        ans + (days - last)
+    }
+}