commit 5f14c1cf3b08cff2d8dbcadaf4ff126892af7392
Author: Andre Henriques <contact@andr3h3nriqu3s.com>
Date:   Mon Dec 1 19:50:42 2025 +0000

    Day 1

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..959a962
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,16 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "anyhow"
+version = "1.0.100"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a23eb6b1614318a8071c9b2521f36b424b2c83db5eb3a0fead4a6c0809af6e61"
+
+[[package]]
+name = "aoc"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+]
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..37e0eb6
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "aoc"
+version = "0.1.0"
+edition = "2024"
+
+[[bin]]
+name = "day1"
+path = "src/day1/main.rs"
+
+[dependencies]
+anyhow = "1.0.100"
diff --git a/src/day1/day1-act.txt b/src/day1/day1-act.txt
new file mode 100644
index 0000000..35d2c5f
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+++ b/src/day1/day1-act.txt
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diff --git a/src/day1/day1-test.txt b/src/day1/day1-test.txt
new file mode 100644
index 0000000..53287c7
--- /dev/null
+++ b/src/day1/day1-test.txt
@@ -0,0 +1,10 @@
+L68
+L30
+R48
+L5
+R60
+L55
+L1
+L99
+R14
+L82
diff --git a/src/day1/main.rs b/src/day1/main.rs
new file mode 100644
index 0000000..7e827c6
--- /dev/null
+++ b/src/day1/main.rs
@@ -0,0 +1,39 @@
+use anyhow::Result;
+use std::{fs, num};
+
+fn main() -> Result<()> {
+    println!("Hello, world!");
+
+    let (count, extra, _) = fs::read_to_string("src/day1/day1-act.txt")?
+        .split("\n")
+        .filter(|s| s.len() > 0)
+        .fold((0, 0, 50 as i32), |(sum, e, p), s| {
+            let modi = if s.chars().nth(0).unwrap() == 'R' {
+                1
+            } else {
+                -1
+            };
+            let v: i32 = s[1..].parse().unwrap();
+            let mut nv: i32 = p + (v % 100) * modi;
+            let mut extra = v / 100;
+            if nv < 0 {
+                nv = 100 + nv;
+                if p != 0 {
+                    extra += 1;
+                }
+            } else if nv == 100 {
+                nv = nv - 100;
+            } else if nv > 100 {
+                nv = nv - 100;
+                if p != 0 {
+                    extra += 1;
+                }
+            }
+            println!("{} - {}: {}", s, nv, extra);
+            (sum + (if nv == 0 { 1 } else { 0 }), e + extra, nv)
+        });
+
+    println!("{} and sec {}", count, count + extra);
+
+    Ok(())
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..e7a11a9
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}