1 files changed, 49 insertions, 0 deletions
diff --git a/works/solutions/src/length_of_longest_substring.rs b/works/solutions/src/length_of_longest_substring.rs
new file mode 100644
index 0000000..cebcc72
--- /dev/null
+++ b/works/solutions/src/length_of_longest_substring.rs
@@ -0,0 +1,49 @@
+use super::Solution;
+
+use std::collections::HashMap;
+
+impl Solution {
+    pub fn length_of_longest_substring(s: String) -> i32 {
+        let mut map = HashMap::new();
+        let mut last_index = 0;
+        let mut result = 0;
+        let bytes = s.as_bytes();
+        for (i, c) in bytes.iter().enumerate() {
+            match map.get(&c) {
+                Some(vi) if *vi >= last_index => {
+                    last_index = *vi + 1;
+                    map.insert(c, i);
+                }
+                _ => {
+                    map.insert(c, i);
+                    let length = i - last_index + 1;
+                    if length > result {
+                        result = length;
+                    }
+                }
+            }
+        }
+        result as i32
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::Solution;
+
+    #[test]
+    fn test() {
+        assert_eq!(
+            Solution::length_of_longest_substring("abcabcbb".to_string()),
+            3
+        );
+        assert_eq!(
+            Solution::length_of_longest_substring("bbbbb".to_string()),
+            1
+        );
+        assert_eq!(
+            Solution::length_of_longest_substring("pwwkew".to_string()),
+            3
+        );
+    }
+}