add: d05 & debug utils

- includes a script to generate a 2GB big challenge
- added utils to internally time functions with minimal overhead
- add functionality to tester.rs

2025/05/p2-hu.rs

@@ -0,0 +1,40 @@
+pub type RangeU = usize;
+
+#[unsafe(no_mangle)]
+extern "Rust" fn challenge_usize(buf: &[u8]) -> usize {
+    let s = unsafe { str::from_utf8_unchecked(buf) };
+    let mut lines = s.lines();
+
+    let mut count = 0;
+
+    let mut ranges: Vec<(RangeU, RangeU)> = Vec::new();
+
+    for range in &mut lines {
+        if range.is_empty() {
+            break;
+        }
+
+        let (l, r) = range.split_once('-').unwrap();
+        let (l, r) = (l.parse().unwrap(), r.parse().unwrap());
+
+        // overlapping here means overlapping or adyacent
+        count += r - l + 1;
+        let overlapping: Option<&mut (RangeU, RangeU)> = None;
+        for (r_l, r_r) in ranges.iter_mut() {
+            if l <= *r_r && r >= *r_r {
+                *r_r = r;
+                //
+            }
+            // (|(l, r)| (l..=r).contains(&fresh))
+        }
+        for fresh in l..=r {
+            println!("{fresh:?}");
+            if ranges.iter().any(|&(l, r)| (l..=r).contains(&fresh)) {
+                count -= 1;
+            }
+        }
+        ranges.push((l, r));
+    }
+
+    count
+}