feat: add rust solution to lc problem: No.1342

No.1342.Number of Steps to Reduce a Number to Zero

Author: YangFong

solution/1300-1399/1342.Number of Steps to Reduce a Number to Zero/README.md

@@ -167,6 +167,39 @@ func numberOfSteps(num int) int {
 }
 ```
 
+### **Rust**
+
+```rust
+impl Solution {
+    pub fn number_of_steps(mut num: i32) -> i32 {
+        let mut count = 0;
+        while num != 0 {
+            if num % 2 == 0 {
+                num >>= 1;
+            } else {
+                num -= 1;
+            }
+            count += 1;
+        }
+        count
+    }
+}
+```
+
+```rust
+impl Solution {
+    pub fn number_of_steps(mut num: i32) -> i32 {
+        if num == 0 {
+            0
+        } else if num % 2 == 0 {
+            1 + Solution::number_of_steps(num >> 1)
+        } else {
+            1 + Solution::number_of_steps(num - 1)
+        }
+    }
+}
+```
+
 ### **...**
 
 ```

solution/1300-1399/1342.Number of Steps to Reduce a Number to Zero/README_EN.md

@@ -160,6 +160,39 @@ func numberOfSteps(num int) int {
 }
 ```
 
+### **Rust**
+
+```rust
+impl Solution {
+    pub fn number_of_steps(mut num: i32) -> i32 {
+        let mut count = 0;
+        while num != 0 {
+            if num % 2 == 0 {
+                num >>= 1;
+            } else {
+                num -= 1;
+            }
+            count += 1;
+        }
+        count
+    }
+}
+```
+
+```rust
+impl Solution {
+    pub fn number_of_steps(mut num: i32) -> i32 {
+        if num == 0 {
+            0
+        } else if num % 2 == 0 {
+            1 + Solution::number_of_steps(num >> 1)
+        } else {
+            1 + Solution::number_of_steps(num - 1)
+        }
+    }
+}
+```
+
 ### **...**
 
 ```

solution/1300-1399/1342.Number of Steps to Reduce a Number to Zero/Solution.rs

@@ -0,0 +1,14 @@
+impl Solution {
+    pub fn number_of_steps(mut num: i32) -> i32 {
+        let mut count = 0;
+        while num != 0 {
+            if num % 2 == 0 {
+                num >>= 1;
+            } else {
+                num -= 1;
+            }
+            count += 1;
+        }
+        count
+    }
+}