solutions: 56

src/bin/powerful_digit_sum.rs

@@ -0,0 +1,14 @@
+use num_bigint::BigUint;
+
+fn main() {
+    let mut sums: Vec<u32> = vec![];
+
+    for i in 1..100 {
+        for j in 1..100 {
+            let power = format!("{}", BigUint::from(i as u64).pow(j));
+            sums.push(power.chars().filter_map(|c| c.to_digit(10)).sum());
+       }
+    }
+
+    println!("{}", sums.iter().max().unwrap());
+}