Initial commitHEADmain

2 files changed, 39 insertions, 0 deletions

diff --git a/palindrome-number/Cargo.toml b/palindrome-number/Cargo.toml
new file mode 100644
index 0000000..dd3c2d3
--- /dev/null
+++ b/palindrome-number/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "palindrome-number"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/palindrome-number/src/main.rs b/palindrome-number/src/main.rs
new file mode 100644
index 0000000..1e0d6d1
--- /dev/null
+++ b/palindrome-number/src/main.rs
@@ -0,0 +1,31 @@
+fn main() {
+    println!("Hello, world!");
+    let tests = [
+        (121, true),
+        (-121, false),
+        (10, false),
+        (1410110141, true)
+    ];
+    for test in tests {
+        println!("{} is {} should be {}", test.0, Solution::is_palindrome(test.0), test.1);
+    }
+}
+
+
+struct Solution {}
+impl Solution {
+    pub fn is_palindrome(x: i32) -> bool {
+        if x < 0 {return false;}
+        let len = (x as f32).log10() as usize;
+        //println!("{} {}", len, (len+1)/2);
+        for i in 0..(len+1)/2 {
+            if (x as u32 / 10_u32.pow(i as u32)) % 10 != (x as u32 / 10_u32.pow((len - i) as u32)) % 10 {
+                return false;
+            }
+        }
+        true
+    }
+    pub fn get(x: i32, i: usize) -> u32 {
+        (x as u32 / 10_u32.pow(i as u32)) % 10
+    }
+}