Day 1

.gitignore

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+bin/

day1/input

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day1/main.rs

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+fn main() {
+    let contents = std::fs::read_to_string("input")
+        .expect("Failed to read file 'input'");
+    let it = contents.split("\n");
+    let mut sum: u64 = 0;
+    let mut sum2: u64 = 0;
+    for val in it {
+        if val == "" {
+            continue;
+        }
+        let mut x = val.parse::<u64>().unwrap();
+        x /= 3;
+        x -= 2;
+        sum += x;
+        sum2 += x;
+        while x > 0 {
+            x /= 3;
+            if x < 2 {
+                x = 0;
+            }
+            else {
+                x -= 2;
+            }
+            sum2 += x;
+        }
+    }
+    println!("[Part 1] The sum is {}", sum);
+    println!("[Part 2] The sum is {}", sum2);
+}