Initial commit

day1/haskell/day1.hs

@@ -0,0 +1,11 @@
+import System.IO
+import Control.Monad
+
+getInts :: FilePath -> IO [Integer]
+getInts path = do
+    contents <- readFile path
+    let ints = (map read . lines $ contents) :: [Integer]
+    return ints
+
+main = do
+    putStrLn "The solution is: "

day1/input

@@ -0,0 +1,100 @@
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+96495
+111504
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+118082
+137413
+135315
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+56247
+58328
+90159
+105700
+57317
+69011
+125544
+102372
+63797
+92127
+111207
+77596

day1/rust/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "day1"
+version = "0.1.0"
+authors = ["Tobias Eidelpes <tobias@eidelpes.info>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

day1/rust/src/main.rs

@@ -0,0 +1,30 @@
+use std::fs::File;
+use std::env;
+use std::io::{Error, BufRead, BufReader};
+
+fn main() -> Result<(), Error> {
+    let args: Vec<String> = env::args().collect();
+
+    let filename = &args[1];
+
+    let reader = BufReader::new(File::open(filename).unwrap());
+
+    let mut result: i64 = 0;
+
+    for line in reader.lines() {
+        let n = line.unwrap().parse::<i64>().unwrap();
+        result += calculate_fuel(n);
+    }
+    println!("Result: {}", result);
+
+    Ok(())
+}
+
+fn calculate_fuel(mass: i64) -> i64 {
+    let fuel = mass / 3 - 2;
+    if fuel < 0 {
+        return 0;
+    } else {
+        return (fuel) + calculate_fuel(fuel);
+    }
+}