diff --git a/tg/maximum_subarray_53/Cargo.lock b/tg/maximum_subarray_53/Cargo.lock
new file mode 100644
index 0000000..ac7ff8b
--- /dev/null
+++ b/tg/maximum_subarray_53/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "maximum_subarray_53"
+version = "0.1.0"
diff --git a/tg/maximum_subarray_53/Cargo.toml b/tg/maximum_subarray_53/Cargo.toml
new file mode 100644
index 0000000..0554ab8
--- /dev/null
+++ b/tg/maximum_subarray_53/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "maximum_subarray_53"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/tg/maximum_subarray_53/src/main.rs b/tg/maximum_subarray_53/src/main.rs
new file mode 100644
index 0000000..8969062
--- /dev/null
+++ b/tg/maximum_subarray_53/src/main.rs
@@ -0,0 +1,43 @@
+
+// 給訂一個陣列 array 拿出最大子集合的總和
+
+pub fn max_sub_array(nums: Vec<i32>) -> i32 {
+    if nums.len() <=0{
+        return 0;
+    }
+
+    let mut c_sum :i32 = nums[0]; // 目前的總和
+    let mut max_sum :i32 = nums[0]; // 總和的最大值
+
+    // 起始條件從一開始，原因是因為 0 已經為初始值，不用再算一次
+    for item in 1..nums.len() {
+        // 要跟自己比，如果這個數字目前最大，就從自己這個數字開始計算就好，因為會有這個case 表示前面 c_sum + nums[item] 已經為負數
+        c_sum = max(nums[item], c_sum+nums[item]);
+        max_sum = max(max_sum,c_sum)
+    }
+
+    return max_sum;
+}
+
+pub fn max(a:i32, b:i32) -> i32 {
+    if a > b {
+        return a;
+    }
+
+    return b;
+}
+
+
+fn main() {
+    let case_a: Vec<i32> = vec![-2,1,-3,4,-1,2,1,-5,4];
+    let result = max_sub_array(case_a);
+    println!("Result: {}", result);
+
+    let case_b: Vec<i32> = vec![1];
+    let result = max_sub_array(case_b);
+    println!("Result: {}", result);
+
+    let case_c: Vec<i32> = vec![5,4,-1,7,8];
+    let result = max_sub_array(case_c);
+    println!("Result: {}", result);
+}
diff --git a/tg/maximum_subarray_53/src/readme.md b/tg/maximum_subarray_53/src/readme.md
new file mode 100644
index 0000000..a9e6fb2
--- /dev/null
+++ b/tg/maximum_subarray_53/src/readme.md
@@ -0,0 +1,30 @@
+Given an integer array nums, find the
+subarray
+with the largest sum, and return its sum.
+
+
+
+Example 1:
+
+Input: nums = [-2,1,-3,4,-1,2,1,-5,4]
+Output: 6
+Explanation: The subarray [4,-1,2,1] has the largest sum 6.
+Example 2:
+
+Input: nums = [1]
+Output: 1
+Explanation: The subarray [1] has the largest sum 1.
+Example 3:
+
+Input: nums = [5,4,-1,7,8]
+Output: 23
+Explanation: The subarray [5,4,-1,7,8] has the largest sum 23.
+
+
+Constraints:
+
+1 <= nums.length <= 105
+-104 <= nums[i] <= 104
+
+
+Follow up: If you have figured out the O(n) solution, try coding another solution using the divide and conquer approach, which is more subtle.
\ No newline at end of file
diff --git a/tg/maximum_subarray_53/target/.rustc_info.json b/tg/maximum_subarray_53/target/.rustc_info.json
new file mode 100644
index 0000000..744d3fc
--- /dev/null
+++ b/tg/maximum_subarray_53/target/.rustc_info.json
@@ -0,0 +1 @@
+{"rustc_fingerprint":13714326583451104423,"outputs":{"15729799797837862367":{"success":true,"status":"","code":0,"stdout":"___\nlib___.rlib\nlib___.dylib\nlib___.dylib\nlib___.a\nlib___.dylib\n/Users/daniel/.rustup/toolchains/stable-aarch64-apple-darwin\noff\npacked\nunpacked\n___\ndebug_assertions\npanic=\"unwind\"\nproc_macro\ntarget_abi=\"\"\ntarget_arch=\"aarch64\"\ntarget_endian=\"little\"\ntarget_env=\"\"\ntarget_family=\"unix\"\ntarget_feature=\"aes\"\ntarget_feature=\"crc\"\ntarget_feature=\"dit\"\ntarget_feature=\"dotprod\"\ntarget_feature=\"dpb\"\ntarget_feature=\"dpb2\"\ntarget_feature=\"fcma\"\ntarget_feature=\"fhm\"\ntarget_feature=\"flagm\"\ntarget_feature=\"fp16\"\ntarget_feature=\"frintts\"\ntarget_feature=\"jsconv\"\ntarget_feature=\"lor\"\ntarget_feature=\"lse\"\ntarget_feature=\"neon\"\ntarget_feature=\"paca\"\ntarget_feature=\"pacg\"\ntarget_feature=\"pan\"\ntarget_feature=\"pmuv3\"\ntarget_feature=\"ras\"\ntarget_feature=\"rcpc\"\ntarget_feature=\"rcpc2\"\ntarget_feature=\"rdm\"\ntarget_feature=\"sb\"\ntarget_feature=\"sha2\"\ntarget_feature=\"sha3\"\ntarget_feature=\"ssbs\"\ntarget_feature=\"vh\"\ntarget_has_atomic=\"128\"\ntarget_has_atomic=\"16\"\ntarget_has_atomic=\"32\"\ntarget_has_atomic=\"64\"\ntarget_has_atomic=\"8\"\ntarget_has_atomic=\"ptr\"\ntarget_os=\"macos\"\ntarget_pointer_width=\"64\"\ntarget_vendor=\"apple\"\nunix\n","stderr":""},"4614504638168534921":{"success":true,"status":"","code":0,"stdout":"rustc 1.78.0 (9b00956e5 2024-04-29)\nbinary: rustc\ncommit-hash: 9b00956e56009bab2aa15d7bff10916599e3d6d6\ncommit-date: 2024-04-29\nhost: aarch64-apple-darwin\nrelease: 1.78.0\nLLVM version: 18.1.2\n","stderr":""}},"successes":{}}
\ No newline at end of file
diff --git a/tg/maximum_subarray_53/target/CACHEDIR.TAG b/tg/maximum_subarray_53/target/CACHEDIR.TAG
new file mode 100644
index 0000000..20d7c31
--- /dev/null
+++ b/tg/maximum_subarray_53/target/CACHEDIR.TAG
@@ -0,0 +1,3 @@
+Signature: 8a477f597d28d172789f06886806bc55
+# This file is a cache directory tag created by cargo.
+# For information about cache directory tags see https://bford.info/cachedir/
diff --git a/tg/maximum_subarray_53/target/debug/.cargo-lock b/tg/maximum_subarray_53/target/debug/.cargo-lock
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diff --git a/tg/maximum_subarray_53/target/debug/.fingerprint/maximum_subarray_53-c92090361541cf7f/bin-maximum_subarray_53 b/tg/maximum_subarray_53/target/debug/.fingerprint/maximum_subarray_53-c92090361541cf7f/bin-maximum_subarray_53
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--- /dev/null
+++ b/tg/maximum_subarray_53/target/debug/.fingerprint/maximum_subarray_53-c92090361541cf7f/bin-maximum_subarray_53
@@ -0,0 +1 @@
+d4ccd69760fe70e7
\ No newline at end of file
diff --git a/tg/maximum_subarray_53/target/debug/.fingerprint/maximum_subarray_53-c92090361541cf7f/bin-maximum_subarray_53.json b/tg/maximum_subarray_53/target/debug/.fingerprint/maximum_subarray_53-c92090361541cf7f/bin-maximum_subarray_53.json
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--- /dev/null
+++ b/tg/maximum_subarray_53/target/debug/.fingerprint/maximum_subarray_53-c92090361541cf7f/bin-maximum_subarray_53.json
@@ -0,0 +1 @@
+{"rustc":792111255936306319,"features":"[]","declared_features":"","target":278490767354053006,"profile":14453530908159220714,"path":1684066648322511884,"deps":[],"local":[{"CheckDepInfo":{"dep_info":"debug/.fingerprint/maximum_subarray_53-c92090361541cf7f/dep-bin-maximum_subarray_53"}}],"rustflags":[],"metadata":7797948686568424061,"config":2202906307356721367,"compile_kind":0}
\ No newline at end of file
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--- /dev/null
+++ b/tg/maximum_subarray_53/target/debug/.fingerprint/maximum_subarray_53-c92090361541cf7f/invoked.timestamp
@@ -0,0 +1 @@
+This file has an mtime of when this was started.
\ No newline at end of file
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+/Users/daniel/Documents/Rust/leetcode-rust/tg/maximum_subarray_53/target/debug/deps/maximum_subarray_53-c92090361541cf7f: src/main.rs
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+/Users/daniel/Documents/Rust/leetcode-rust/tg/maximum_subarray_53/target/debug/maximum_subarray_53: /Users/daniel/Documents/Rust/leetcode-rust/tg/maximum_subarray_53/src/main.rs