update 1002. 查找常用字符 about rust

problems/1002.查找常用字符.md

@@ -451,6 +451,42 @@ object Solution {
   }
 }
 ```
+
+Rust:
+
+```rust
+impl Solution {
+    pub fn common_chars(words: Vec<String>) -> Vec<String> {
+        if words.is_empty() {
+            return vec![];
+        }
+        let mut res = vec![];
+        let mut hash = vec![0; 26];
+        for i in words[0].bytes() {
+            hash[(i - b'a') as usize] += 1;
+        }
+        for i in words.iter().skip(1) {
+            let mut other_hash_str = vec![0; 26];
+            for j in i.bytes() {
+                other_hash_str[(j - b'a') as usize] += 1;
+            }
+            for k in 0..26 {
+                hash[k] = hash[k].min(other_hash_str[k]);
+            }
+        }
+
+        for (i, v) in hash.iter_mut().enumerate() {
+            while *v > 0 {
+                res.push(((i as u8 + b'a') as char).to_string());
+                *v -= 1;
+            }
+        }
+
+        res
+    }
+}
+```
+
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