From 45394c7cc8f6191e88edd6280b308ae69f588376 Mon Sep 17 00:00:00 2001
From: JSDurand <mmemmew@gmail.com>
Date: Thu, 9 Mar 2023 17:15:06 +0800
Subject: Minor modifications

---
 src/main.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/main.rs b/src/main.rs
index 301ca32..64709b1 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -109,6 +109,12 @@ fn sm<T: PartialOrd>(a: Vec<T>, count: &mut usize) -> Vec<usize> {
         let hi = *g_to_a_s.last().unwrap().get(hi).unwrap();
 
         result.push(hi);
+
+        if i + 1 == n {
+            // early break to prevent unnecessary efforts
+            break;
+        }
+
         *added.get_mut(hi).unwrap() = true;
 
         lis.push(li);
@@ -157,6 +163,11 @@ fn main() {
 
     // println!("        {enumeration:?}");
 
+    if inputs.is_empty() {
+        println!("Please input some numbers to sort.");
+        return;
+    }
+
     println!("inputs: {inputs:?}");
 
     let mut count = 0;
-- 
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