From d8f3b40085619cb680c8f227c65a1f5acc393223 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Tue, 23 Feb 2021 21:07:19 +0800
Subject: Move leetcode solutions to subdir.

---
 leetcode/rust/src/length_of_longest_substring.rs | 47 ++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 leetcode/rust/src/length_of_longest_substring.rs

(limited to 'leetcode/rust/src/length_of_longest_substring.rs')

diff --git a/leetcode/rust/src/length_of_longest_substring.rs b/leetcode/rust/src/length_of_longest_substring.rs
new file mode 100644
index 0000000..cbd5e14
--- /dev/null
+++ b/leetcode/rust/src/length_of_longest_substring.rs
@@ -0,0 +1,47 @@
+use super::Solution;
+
+impl Solution {
+    pub fn length_of_longest_substring(s: String) -> i32 {
+        let mut map: [i32; std::u8::MAX as usize] = [-1; std::u8::MAX as usize];
+        let mut last_index: i32 = 0;
+        let mut result: i32 = 0;
+        let bytes = s.as_bytes();
+        for (i, c) in bytes.iter().enumerate() {
+            let i = i as i32;
+            let c = *c as usize;
+            let li = map[c];
+            if li >= last_index {
+                last_index = li + 1;
+                map[c] = i;
+            } else {
+                map[c] = i;
+                let length = i - last_index + 1;
+                if length > result {
+                    result = length;
+                }
+            }
+        }
+        result
+    }
+}
+
+#[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
+        );
+    }
+}
-- 
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