feat: add cs solution to lc problem: No.2849 (#1943)

Author: dev-mauli

solution/2800-2899/2849.Determine if a Cell Is Reachable at a Given Time/README.md

@@ -126,6 +126,18 @@ function isReachableAtTime(sx: number, sy: number, fx: number, fy: number, t: nu
 }
 ```
 
+### **C#**
+
+```cs
+public class Solution {
+    public bool IsReachableAtTime(int sx, int sy, int fx, int fy, int t) {
+        if (sx == fx && sy == fy)
+            return t != 1;
+        return Math.Max(Math.Abs(sx - fx), Math.Abs(sy - fy)) <= t;
+    }
+}
+```
+
 ### **...**
 
 ```

solution/2800-2899/2849.Determine if a Cell Is Reachable at a Given Time/README_EN.md

@@ -116,6 +116,18 @@ function isReachableAtTime(sx: number, sy: number, fx: number, fy: number, t: nu
 }
 ```
 
+### **C#**
+
+```cs
+public class Solution {
+    public bool IsReachableAtTime(int sx, int sy, int fx, int fy, int t) {
+        if (sx == fx && sy == fy)
+            return t != 1;
+        return Math.Max(Math.Abs(sx - fx), Math.Abs(sy - fy)) <= t;
+    }
+}
+```
+
 ### **...**
 
 ```

solution/2800-2899/2849.Determine if a Cell Is Reachable at a Given Time/Solution.cs

@@ -0,0 +1,7 @@
+public class Solution {
+    public bool IsReachableAtTime(int sx, int sy, int fx, int fy, int t) {
+        if (sx == fx && sy == fy)
+            return t != 1;
+        return Math.Max(Math.Abs(sx - fx), Math.Abs(sy - fy)) <= t;
+    }
+}