feat: add rust solution to lc problem: No.1791

No.1791.Find Center of Star Graph

Author: YangFong

solution/1700-1799/1791.Find Center of Star Graph/README.md

@@ -108,6 +108,19 @@ func findCenter(edges [][]int) int {
 }
 ```
 
+### **Rust**
+
+```rust
+impl Solution {
+    pub fn find_center(edges: Vec<Vec<i32>>) -> i32 {
+        if edges[0][0] == edges[1][0] || edges[0][0] == edges[1][1] {
+            return edges[0][0];
+        }
+        edges[0][1]
+    }
+}
+```
+
 ### **...**
 
 ```

solution/1700-1799/1791.Find Center of Star Graph/README_EN.md

@@ -109,6 +109,19 @@ func findCenter(edges [][]int) int {
 }
 ```
 
+### **Rust**
+
+```rust
+impl Solution {
+    pub fn find_center(edges: Vec<Vec<i32>>) -> i32 {
+        if edges[0][0] == edges[1][0] || edges[0][0] == edges[1][1] {
+            return edges[0][0];
+        }
+        edges[0][1]
+    }
+}
+```
+
 ### **...**
 
 ```

solution/1700-1799/1791.Find Center of Star Graph/Solution.rs

@@ -0,0 +1,8 @@
+impl Solution {
+    pub fn find_center(edges: Vec<Vec<i32>>) -> i32 {
+        if edges[0][0] == edges[1][0] || edges[0][0] == edges[1][1] {
+            return edges[0][0];
+        }
+        edges[0][1]
+    }
+}