From 2f6c1ef96b38c02aa79ebb203e7977f4fd8f9497 Mon Sep 17 00:00:00 2001
From: "Dr. Matthias Ratajczak" <m.ratajczak@hzdr.de>
Date: Fri, 19 Aug 2022 20:44:19 +0200
Subject: [PATCH] finish 80

---
 src/euler80/Cargo.toml  |  9 +++++++++
 src/euler80/src/main.rs | 22 ++++++++++++++++++++++
 2 files changed, 31 insertions(+)
 create mode 100644 src/euler80/Cargo.toml
 create mode 100644 src/euler80/src/main.rs

diff --git a/src/euler80/Cargo.toml b/src/euler80/Cargo.toml
new file mode 100644
index 0000000..f99635a
--- /dev/null
+++ b/src/euler80/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "euler80"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rug = "*"
diff --git a/src/euler80/src/main.rs b/src/euler80/src/main.rs
new file mode 100644
index 0000000..a298145
--- /dev/null
+++ b/src/euler80/src/main.rs
@@ -0,0 +1,22 @@
+extern crate rug;
+
+use rug::Float;
+
+fn main() {
+    let mut result = 0;
+    for x in 2..=100 {
+        let two = Float::with_val(1024, x);
+        let root = two.sqrt();
+        let inner: u32 = root
+            .to_string()
+            .chars()
+            .filter(|c| *c != '.')
+            .take(100)
+            .map(|c| c.to_digit(10).unwrap())
+            .sum();
+        if inner > 50 {
+            result += inner;
+        }
+    }
+    println!("{result}");
+}