feat: add rust solution to lcci problem: No.01.06

No.01.06.Compress String

Author: YangFong

lcci/01.06.Compress String/README.md

@@ -136,6 +136,36 @@ func compressString(S string) string {
 }
 ```
 
+### **Rust**
+
+```rust
+impl Solution {
+    pub fn compress_string(s: String) -> String {
+        let mut cs: Vec<char> = s.chars().collect();
+        cs.push(' ');
+        let mut res = vec![];
+        let mut l = 0;
+        let mut cur = cs[0];
+        for i in 1..cs.len() {
+            if cs[i] != cur {
+                let count = (i - l).to_string();
+                l = i;
+                res.push(cur);
+                cur = cs[i];
+                for c in count.chars() {
+                    res.push(c);
+                }
+            }
+        }
+        if res.len() >= cs.len() - 1 {
+            s
+        } else {
+            res.iter().collect()
+        }
+    }
+}
+```
+
 ### **...**
 
 ```

lcci/01.06.Compress String/README_EN.md

@@ -134,6 +134,36 @@ func compressString(S string) string {
 }
 ```
 
+### **Rust**
+
+```rust
+impl Solution {
+    pub fn compress_string(s: String) -> String {
+        let mut cs: Vec<char> = s.chars().collect();
+        cs.push(' ');
+        let mut res = vec![];
+        let mut l = 0;
+        let mut cur = cs[0];
+        for i in 1..cs.len() {
+            if cs[i] != cur {
+                let count = (i - l).to_string();
+                l = i;
+                res.push(cur);
+                cur = cs[i];
+                for c in count.chars() {
+                    res.push(c);
+                }
+            }
+        }
+        if res.len() >= cs.len() - 1 {
+            s
+        } else {
+            res.iter().collect()
+        }
+    }
+}
+```
+
 ### **...**
 
 ```

lcci/01.06.Compress String/Solution.rs

@@ -0,0 +1,25 @@
+impl Solution {
+    pub fn compress_string(s: String) -> String {
+        let mut cs: Vec<char> = s.chars().collect();
+        cs.push(' ');
+        let mut res = vec![];
+        let mut l = 0;
+        let mut cur = cs[0];
+        for i in 1..cs.len() {
+            if cs[i] != cur {
+                let count = (i - l).to_string();
+                l = i;
+                res.push(cur);
+                cur = cs[i];
+                for c in count.chars() {
+                    res.push(c);
+                }
+            }
+        }
+        if res.len() >= cs.len() - 1 {
+            s
+        } else {
+            res.iter().collect()
+        }
+    }
+}