Update.

.gitignore

@@ -1,5 +1,6 @@
 /target
 .idea
+.fleet
 # Generated by Cargo
 # will have compiled files and executables
 debug/

src/prob1/mod.rs

@@ -1,20 +1,19 @@
 use std::cmp::Reverse;
 
 pub fn solve_part1(file_path: &str) -> i32 {
-    let contents =
-        std::fs::read_to_string(file_path).expect("Please provide a text file as an argument.");
-    let lines: Vec<&str> = contents.split('\n').collect();
-
     let mut max = 0;
     let mut accumulated = 0;
-    lines.iter().for_each(|number| {
-        if let Ok(yay) = number.parse::<i32>() {
-            accumulated += yay;
-        } else {
-            max = max.max(accumulated);
-            accumulated = 0;
-        }
-    });
+    std::fs::read_to_string(file_path)
+        .unwrap_or_else(|err| panic!("Please provide a text file as an argument: {err}"))
+        .lines()
+        .for_each(|number| {
+            if let Ok(yay) = number.parse::<i32>() {
+                accumulated += yay;
+            } else {
+                max = max.max(accumulated);
+                accumulated = 0;
+            }
+        });
     max
 }
 

src/prob5.rs

@@ -114,7 +114,7 @@ fn parser(content: &str) {
 }
 
 pub fn solve(file_path: &str) -> i32 {
-    let content = std::fs::read_to_string(file_path).expect("Please provide a file.");
+    let content = std::fs::read_to_string(file_path).unwrap_or_else(|err| panic!("{err}"));
     parser(&content);
     0
 }