41

src/euler41/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "euler41"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+primes = {version = "*", path = "../../lib/primes"}

src/euler41/src/main.rs

@@ -0,0 +1,24 @@
+use primes::Primes;
+
+fn main() {
+    let primes = Primes::get_between(2, 7_654_321);
+    let result = primes
+        .into_vec()
+        .into_iter()
+        .rev()
+        .filter_map(|number| is_pandigital(&number.to_string()))
+        .next()
+        .unwrap();
+
+    println!("{result}");
+}
+
+fn is_pandigital(s: &str) -> Option<String> {
+    let length = s.len().to_string().chars().next().unwrap();
+    for c in '1'..=length {
+        if !s.contains(c) {
+            return None;
+        }
+    }
+    Some(s.to_string())
+}