day 1 in rust

day01/.gitignore

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+/target

day01/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "day01"
+version = "0.1.0"

day01/Cargo.toml

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+[package]
+name = "day01"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

day01/exampleInput.txt

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+1000
+2000
+3000
+
+4000
+
+5000
+6000
+
+7000
+8000
+9000
+
+10000

day01/src/main.rs

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+use std::fs;
+
+fn main() {
+    let file_path = "input.txt";
+    println!("Reading file {}", file_path);
+    let contents = fs::read_to_string(file_path).expect("Should have been able to read the file");
+    let splitted: Vec<&str> = contents.split("\n\n").collect();
+    let mut all_sums: Vec<i32> = vec![];
+    for s in &splitted {
+        let split_group: Vec<&str> = s.split("\n").collect();
+        let mut sum_in_group: i32 = 0;
+        for g in &split_group {
+            sum_in_group += g.parse::<i32>().unwrap_or(0);
+        }
+        all_sums.push(sum_in_group);
+        //println!("Sum: {}", sum_in_group.to_string());
+    }
+
+    all_sums.sort();
+    let top_three: Vec<i32> = all_sums[all_sums.len() - 3..].to_vec();
+    println!("Top Three: {:?}", top_three);
+    let sum: i32 = top_three.iter().sum();
+    println!("{}", sum);
+}