030 ok

030/main.rs

@@ -0,0 +1,44 @@
+struct Num {
+    n: u32,
+    digits: Vec<u8>
+}
+
+impl Num {
+    fn new(n: u32) -> Num {
+        let mut dsr = Vec::new();
+        let mut k = n;
+        while k != 0 {
+            let a = (k % 10) as u8;
+            k /= 10;
+            dsr.push(a);
+        }
+        dsr.reverse();
+        return Num { n, digits: dsr };
+    }
+    fn check(&self) -> bool {
+        let mut sum = 0u32;
+        for k in &self.digits {
+            let d = *k as u32;
+            sum += d * d * d * d * d;
+        }
+        return sum == self.n;
+    }
+}
+
+fn main() {
+    //let n = Num::new(9474);
+    //for d in &n.digits { print!("{}", d) }
+    //println!("");
+    //println!("{}", n.check());
+    let mut sum = 0u32;
+    for i in 2..5_000_000u32 {
+        let n = Num::new(i);
+        if n.check() {
+            println!("{}", n.n);
+            sum += n.n;
+        }
+    }
+    println!("{}", sum);
+}
+
+