From 1f10c7a15f612c080d7d8ff72f76d6def90e3acb Mon Sep 17 00:00:00 2001
From: davidon-top <me@davidon.top>
Date: Wed, 4 Dec 2024 09:06:20 +0100
Subject: [PATCH] u4 and utils

---
 Cargo.lock   | 1610 +++++++++++++++++++++++++++++++++++++++++++++++++-
 Cargo.toml   |    7 +-
 src/main.rs  |    1 +
 src/u4.rs    |   17 +-
 src/utils.rs |   23 +
 5 files changed, 1653 insertions(+), 5 deletions(-)
 create mode 100644 src/utils.rs

diff --git a/Cargo.lock b/Cargo.lock
index a956e02..d96474c 100644
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+ "windows_x86_64_gnu",
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+ "core-foundation",
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+ "log",
+ "objc",
+ "parking_lot",
+ "percent-encoding",
+ "raw-window-handle 0.3.4",
+ "smithay-client-toolkit",
+ "wayland-client",
+ "winapi",
+ "x11-dl",
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diff --git a/Cargo.toml b/Cargo.toml
index e5fc831..7c2aae9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,9 +1,10 @@
 [package]
 name = "ulohy"
 version = "0.1.0"
-edition = "2021"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+edition = "2024"
 
+[profile.dev.package."*"]
+opt-level = 3
 
 [dependencies]
+turtle = "1.0.0-rc.3"
diff --git a/src/main.rs b/src/main.rs
index 2733488..bab1f9b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -46,6 +46,7 @@ pub mod u45;
 pub mod u46;
 pub mod u47;
 pub mod u48;
+mod utils;
 
 fn main() {
     let ulohy = vec![
diff --git a/src/u4.rs b/src/u4.rs
index da0f5d9..bc5f904 100644
--- a/src/u4.rs
+++ b/src/u4.rs
@@ -1 +1,16 @@
-pub fn main() {}
+/*
+Vytvorte podprogram palindrom, ktorý zistí, či je slovo zadané na vstupe palindróm. Slovo zadávame malými písmenami, nepoužívame medzery a diakritiku.
+
+Poznámka: Palindróm je slovo, veta, číslo (všeobecne akákoľvek postupnosť symbolov), ktoré má tú vlastnosť, že ju možno čítať v ľubovoľnom smere (sprava doľava alebo zľava doprava) a má vždy rovnaký význam.
+*/
+
+pub fn main() {
+    let mut input = String::new();
+    std::io::stdin().read_line(&mut input).unwrap();
+    
+    println!("{}", palindrome(input.trim().to_string()));
+}
+
+fn palindrome(s: String) -> bool {
+    s.chars().zip(s.chars().rev()).all(|(a, b)| a == b)
+}
diff --git a/src/utils.rs b/src/utils.rs
new file mode 100644
index 0000000..7428248
--- /dev/null
+++ b/src/utils.rs
@@ -0,0 +1,23 @@
+use turtle::Point;
+
+pub struct Vec2 {
+    pub x: f64,
+    pub y: f64,
+}
+
+impl Vec2 {
+    pub fn new(x: f64, y: f64) -> Self {
+        Self { x, y }
+    }
+    
+    pub fn from_points(p1: Point, p2: Point) -> Self {
+        Self {
+            x: p2.x - p1.x,
+            y: p2.y - p1.y,
+        }
+    }
+    
+    pub fn size(&self) -> f64 {
+        (self.x.powi(2) + self.y.powi(2)).sqrt()
+    }
+}
\ No newline at end of file