From 0087ebeeb0622b0264e8932a2a0cb8eac4debe92 Mon Sep 17 00:00:00 2001
From: newde <lynewde@outlook.com>
Date: Sat, 21 Mar 2026 02:16:45 -0400
Subject: [PATCH] =?UTF-8?q?=E6=96=B0=E5=A2=9E=2020260321?=
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---
 20260321 | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 20260321

diff --git a/20260321 b/20260321
new file mode 100644
index 0000000..bfe466f
--- /dev/null
+++ b/20260321
@@ -0,0 +1,45 @@
+#include <iostream>
+using namespace std;
+
+// 判断是否是素数
+bool isPrime(int n)
+{
+    if (n < 2) return false;
+
+    for (int i = 2; i * i <= n; i++)
+    {
+        if (n % i == 0)
+            return false;
+    }
+    return true;
+}
+
+// 判断是否是回文数
+bool isPalindrome(int n)
+{
+    int original = n;
+    int reversed = 0;
+
+    while (n > 0)
+    {
+        reversed = reversed * 10 + n % 10;
+        n /= 10;
+    }
+
+    return original == reversed;
+}
+
+int main()
+{
+    cout << "100到1000之间的回文素数有：" << endl;
+
+    for (int i = 100; i <= 1000; i++)
+    {
+        if (isPrime(i) && isPalindrome(i))
+        {
+            cout << i << " ";
+        }
+    }
+
+    return 0;
+}
\ No newline at end of file