add initial data

longest-common-prefix/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "longest-common-prefix"
+version = "0.1.0"

longest-common-prefix/Cargo.toml

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+[package]
+name = "longest-common-prefix"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

longest-common-prefix/src/main.rs

@@ -0,0 +1,28 @@
+fn main() {
+    println!("Hello, world!");
+}
+
+fn longest_common_prefix(strs: Vec<String>) -> String {
+    let mut strs = strs;
+
+    strs.sort_by_key(|x| x.len());
+
+    let chars = strs
+        .into_iter()
+        .map(|s| s.chars().collect::<Vec<char>>())
+        .collect::<Vec<_>>();
+
+    let first_word_chars = chars.first().unwrap();
+
+    let mut result = String::new();
+
+    for (i, c) in first_word_chars.iter().enumerate() {
+        if chars.iter().all(|vc| vc[i] == *c) {
+            result.push(*c);
+        } else {
+            return result;
+        }
+    }
+
+    result
+}