From d19b5d9ca8c9b3b38bf54296c8aae8e3068381e1 Mon Sep 17 00:00:00 2001
From: li-chx <li_chx@qq.com>
Date: Fri, 14 Aug 2026 20:20:45 +0800
Subject: [PATCH] =?UTF-8?q?3090.=20=E6=AF=8F=E4=B8=AA=E5=AD=97=E7=AC=A6?=
 =?UTF-8?q?=E6=9C=80=E5=A4=9A=E5=87=BA=E7=8E=B0=E4=B8=A4=E6=AC=A1=E7=9A=84?=
 =?UTF-8?q?=E6=9C=80=E9=95=BF=E5=AD=90=E5=AD=97=E7=AC=A6=E4=B8=B2?=
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---
 src/main.rs | 37 +++++++++++++------------------------
 1 file changed, 13 insertions(+), 24 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 972a2b6..d05e0d0 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -6,36 +6,25 @@ mod tree;
 
 struct Solution {}
 impl Solution {
-    pub fn decode_string(s: String) -> String {
-        let mut st = vec![];
-        let mut local = "".to_string();
-        let mut cnt = 0;
-        // let mut layer = 0;
-        for c in s.chars() {
-            if c.is_ascii_digit() {
-                cnt = cnt * 10 + c.to_digit(10).unwrap() as usize;
-                continue;
+    pub fn maximum_length_substring(s: String) -> i32 {
+        let s = s.bytes().map(|x| x as usize).collect::<Vec<_>>();
+        let mut arr = vec![0; 'z' as usize + 1];
+        let mut l = 0;
+        let mut ans = 0;
+        for r in 0..s.len() {
+            arr[s[r]] += 1;
+            while arr[s[r]] > 2 {
+                arr[s[l]] -= 1;
+                l += 1;
             }
-            if c == '[' {
-                st.push((local,cnt));
-                cnt = 0;
-                local = "".to_string();
-                continue;
-            }
-            if c == ']' {
-                let (mut str, cnt) = st.pop().unwrap();
-                str += &local.repeat( cnt);
-                local = str;
-                continue;
-            }
-            local.push(c);
+            ans = ans.max(r - l + 1);
         }
-        local
+        ans as i32
     }
 }
 fn main() {
     println!(
         "{:?}",
-        Solution::decode_string("3[a2[c]]".to_string())
+        Solution::maximum_length_substring("bcbbbcba".to_string())
     );
 }