feat: add rust solution to lc problem: No.0278

No.0278.First Bad Version

Author: YangFong

solution/0200-0299/0278.First Bad Version/README.md

@@ -185,6 +185,30 @@ func firstBadVersion(n int) int {
 }
 ```
 
+### **Rust**
+
+```rust
+// The API isBadVersion is defined for you.
+// isBadVersion(version:i32)-> bool;
+// to call it use self.isBadVersion(version)
+
+impl Solution {
+    pub fn first_bad_version(&self, n: i32) -> i32 {
+        let mut l = 1;
+        let mut r = n;
+        while l <= r {
+            let mid = l + (r - l) / 2;
+            if self.isBadVersion(mid) {
+                r = mid - 1
+            } else {
+                l = mid + 1
+            }
+        }
+        l
+    }
+}
+```
+
 ### **...**
 
 ```

solution/0200-0299/0278.First Bad Version/README_EN.md

@@ -173,6 +173,30 @@ func firstBadVersion(n int) int {
 }
 ```
 
+### **Rust**
+
+```rust
+// The API isBadVersion is defined for you.
+// isBadVersion(version:i32)-> bool;
+// to call it use self.isBadVersion(version)
+
+impl Solution {
+    pub fn first_bad_version(&self, n: i32) -> i32 {
+        let mut l = 1;
+        let mut r = n;
+        while l <= r {
+            let mid = l + (r - l) / 2;
+            if self.isBadVersion(mid) {
+                r = mid - 1
+            } else {
+                l = mid + 1
+            }
+        }
+        l
+    }
+}
+```
+
 ### **...**
 
 ```

solution/0200-0299/0278.First Bad Version/Solution.rs

@@ -0,0 +1,19 @@
+// The API isBadVersion is defined for you.
+// isBadVersion(version:i32)-> bool;
+// to call it use self.isBadVersion(version)
+
+impl Solution {
+    pub fn first_bad_version(&self, n: i32) -> i32 {
+        let mut l = 1;
+        let mut r = n;
+        while l <= r {
+            let mid = l + (r - l) / 2;
+            if self.isBadVersion(mid) {
+                r = mid - 1
+            } else {
+                l = mid + 1
+            }
+        }
+        l
+    }
+}