Started out with PE 090, but it's pretty hard

projecteuler/090/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "main"
+version = "0.1.0"

projecteuler/090/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "main"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

projecteuler/090/src/main.rs

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+use std::time::Instant;
+
+fn main() {
+    println!("Hello, this is Patrick!");
+    let now = Instant::now();
+    // We can't just loop through all possibilities because that would something in the order of
+    // (10*9*8*7*6*5)^2, which is a really big scary number
+
+    println!("Time passed: {:?}", Instant::now() - now);
+}