diff --git a/2023/inputs/day07 b/2023/inputs/day07
new file mode 100644
index 0000000..448d9e9
--- /dev/null
+++ b/2023/inputs/day07
@@ -0,0 +1,1000 @@
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diff --git a/2023/src/bin/day07.rs b/2023/src/bin/day07.rs
new file mode 100644
index 0000000..f0a53ad
--- /dev/null
+++ b/2023/src/bin/day07.rs
@@ -0,0 +1,69 @@
+#![feature(test)]
+extern crate test;
+use aoc2023::{boilerplate, common::*};
+use itertools::Itertools;
+
+const DAY: usize = 7;
+type I = usize;
+type Parsed = Vec<([I; 5], I, I)>;
+
+const CARDS: [u8; 13] = [b'2', b'3', b'4', b'5', b'6', b'7', b'8', b'9', b'T', b'J', b'Q', b'K', b'A'];
+
+fn parse_input(raw: &str) -> Parsed {
+    raw.lines()
+        .map(|l| l.split_once(' ').unwrap())
+        .map(|(hand, points)| {
+            (<[_; 5]>::try_from(hand.as_bytes()).unwrap().map(|b| CARDS.iter().position(|&c| c == b).unwrap()), parse_num(points))
+        })
+        .map(|(hand, points)| (hand, points, hand.iter().fold(0, |acc, n| (acc << 4) + n)))
+        .collect()
+}
+
+fn part1(hands: &Parsed) -> usize {
+    let mut rated_hands = hands
+        .iter()
+        .cloned()
+        .map(|(mut hand, points, tiebreak)| {
+            hand.sort();
+            let paired = hand
+                .into_iter()
+                .map(|c| (c, 1))
+                .coalesce(|(c1, n1), (c2, n2)| if c1 == c2 { Ok((c1, n1 + n2)) } else { Err(((c1, n1), (c2, n2))) })
+                .map(|(_, n)| n)
+                .collect_vec();
+            let value = match paired.as_slice() {
+                [_] => (1 << 30) + tiebreak,
+                [4, 1] | [1, 4] => (1 << 29) + tiebreak,
+                [3, 2] | [2, 3] => (1 << 28) + tiebreak,
+                [3, 1, 1] | [1, 3, 1] | [1, 1, 3] => (1 << 27) + tiebreak,
+                // can only be 2 pair
+                [_, _, _] => (1 << 26) + tiebreak,
+                [_, _, _, _] => (1 << 25) + tiebreak,
+                _ => (1 << 24) + tiebreak,
+            };
+            (value, points)
+        })
+        .collect_vec();
+    rated_hands.sort_unstable_by_key(|(v, _)| *v);
+    rated_hands.into_iter().zip(1..).map(|((_, points), position)| points * position).sum()
+}
+
+fn part2(parsed: &Parsed) -> usize {
+    unimplemented!()
+}
+
+boilerplate! {
+    TEST_INPUT == "\
+32T3K 765
+T55J5 684
+KK677 28
+KTJJT 220
+QQQJA 483",
+    tests: {
+        part1: { TEST_INPUT => 6440 },
+        part2: { TEST_INPUT => 0 },
+    },
+    bench1 == 248812215,
+    bench2 == 0,
+    bench_parse: Vec::len => 1000,
+}