From 8b5de86a59b48ee5f327cea12fc28e26f72d09a3 Mon Sep 17 00:00:00 2001
From: rajputchauhan1 <prathamchauhan2001@gmail.com>
Date: Wed, 27 Oct 2021 21:04:47 +0530
Subject: [PATCH] Added

---
 Rust/kadane.rs | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 Rust/kadane.rs

diff --git a/Rust/kadane.rs b/Rust/kadane.rs
new file mode 100644
index 0000000..1a609cb
--- /dev/null
+++ b/Rust/kadane.rs
@@ -0,0 +1,28 @@
+use std::cmp::max;
+
+/**
+ * Kadane's algorithm (O(n) time)
+ * Maximum Subarray Problem.
+ * dp[0] = arr[0]
+ * dp[i] = max(dp[i-1], 0) + arr[i]
+ */
+pub fn kadane(arr: &[i64]) -> i64 {
+    let mut dp: Vec<i64> = vec![0; arr.len()];
+    dp[0] = arr[0];
+    let mut mmax: i64 = dp[0];
+    for i in 1..arr.len() {
+        dp[i] = max(dp[i - 1], 0) + arr[i];
+        mmax = max(mmax, dp[i]);
+    }
+    return mmax;
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn kadane_test() {
+        assert_eq!(kadane(&([-3, 1, -8, 12, 0, -3, 5, -9, 4])), 14);
+    }
+}