day 6

Cargo.lock

@@ -6,9 +6,25 @@ version = 3
 name = "aoc2022"
 version = "0.1.0"
 dependencies = [
+ "itertools",
  "nom",
 ]
 
+[[package]]
+name = "either"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "90e5c1c8368803113bf0c9584fc495a58b86dc8a29edbf8fe877d21d9507e797"
+
+[[package]]
+name = "itertools"
+version = "0.10.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b0fd2260e829bddf4cb6ea802289de2f86d6a7a690192fbe91b3f46e0f2c8473"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "memchr"
 version = "2.5.0"

Cargo.toml

@@ -6,4 +6,5 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+itertools = "0.10.5"
 nom = "7.1.1"

inputs/day6.txt

@@ -0,0 +1 @@
+nfddjzjjjmrjjfttzctzzhqzqbbvhhcfcpcqpcqpccsmsvsswbwzwfffnvfvpfvffhnnrgngzgrrhvhfhvvmjvjcccvppqdppbnbjjzlzflfccjjtctqccrhrnhnqhqwwjssjjhpjjcqqdgghddhfdfbffdpfdfzdddthhrcrbrqrbqqbcbnnwbbzcbzccmqqwllrljjjpqpdpsddmbmccwwgngmmzzzpbpspnprnppprmmwfwffrrpsrrchrrrrdqdfddnvnjnppqmqhhpshhjmhjhzjhhhzllbpbnnngdgzgmmjvvprrhqrhqhpqhqqrnqnddvjvvftfggfcgfffgrghhbmbzzjczzcscrccgbbjbqjbjsbsqbqttbqbfqqqrzrmzrmmcwcmwmrwmwnmnfnjjbdjbbslltjjmgmrmllhbhsbsmsqmqllvjjrvjrjcrrtztjzjbjsbbrjjvbjjgqjjpjsszpszsnznllvmlmfmppbvbzvvddtbtrbttchthjthjhnjnqnqrrllnflnnljnnzjjswjwllpmmpnnqnrrndnnbwwmcmcmbbhjjbbfpfvpvttcvvhshqqznzqqdndldmllpgptgptpbblzlddgqqdmmvpvvrccfvvjrvjjgpggqcggjbgbqqcgqccgppffjppzczmzdmmqppwcwlcwwhccfpcphcctvtzthtzhhnmnvmnnvqnqnpnqqwqsqdsszwzbwwgcwcrrtprrfhhcmcqcdcvdcccnpptgpgwpprsprsrdrtdrtrntrtprtppstsccbwwvnvpnvpnptpqttzbzcznzhzhddfbflfcchvchhplhlwhhlhglhhwqqzlqzlzvlvtlvtvrttglttslslclslqssslclbbrjrpjjcscfsfppjlplhplptlltlflglffdttmffrggfjjmllbnlnbnznqnfffmhhnmmsgmsmfsszggpnnhmhnnpwnndqqlmqmnmtnmtnttvtztlzlnzzsdsnssvhsszcscffcpczpcpffpwfwnwhnntnssptthccbnndppgjgpjpssbnnpgnpppjtjqqzfqqrrbmmbdddzjzvzwzssnpsnspnpvnpppjppvsvffmpffbcffslfsfmsmmqzzmttnsnqsqcsqsbqbcclqqphpttvrtrlrhrthhlppscsrsjjvljlmlwlslblqqqgdsbrzwzjzwcjrwbpfmjtmdgjvbcfvtvmsfjtjcmtlzmsjlnmhcswcmjndggdsmqfmmdngjpvrsbhrchldnhdhfdlwccnfmgbwfzppgzzcvblvsmqbfghrgdwlzdcvpqthgbdlwbrfpsvlgpdqznftswgwvchjfrblbdsqjmzchfhlrjhpbrdgvgrrmhrnrdbrdsfsgzvqfdtnvddbtcjwphrhgpqlzjssrgzjcncjnbrzvhgbwpgtfnqhpspmgptzcgvjqgzpmwtjtzldqnclmplwdpzcppgcbrsnlzfgmlnljjhfzrftnhdfnqchgdqrfcjszvbmdrghwzmjnwgnrlptljzqrwsmcfwvbcjgsfdjhnqgzzztmcgmndbtdwvqmzlfcmhfgpqztwgjdccncdccpgbcvhfzbhhbjhgjpdzcmrwgtvrmzdwjtmlzllmgplpqjwwwvbrzgmvpcvwchcwfgbjtzrfctgvfrpphbnsbjlswrztqmchtzfstzdgdwwvhpdhztbmsrbqmndpgvnwwdtgzcddvmvbjstqmjvtzlzgrhzhvplwnpphctvtlvnpmwfzmqcvrnfmmgtsgbcjpffrvbpqpszfpjsjtzqmcnzhnjnpwtvgfqntnhhjhmbvmlvmqgggrnfmmmsvfsqffbvwtzlfhlbjqhrltzwfstvjqhbbblqdbcmgtjgmzdtpslbzsgnmpzsswjlwdpzpmmvmpntbhnqlwrcrfbghzhwlhhpjqztjjrrfscrtwtnlqlqmdbmbfnvngvvthhghgsvqlqvgvmtjmjtwpcznzqhhfpqqfphcdrtzjjhsffslthzwpmsnltnjmfgpsjgqzdwrtgnhflhrnjwqftpnqgptgvgjptzhhtqhtddsfhppmmqcrsnlnrswpjhqgzbpwzfzptzqzzwltlrmjwjrwdgvvzhshqqrhtzmvqpfljlvpmrzbqpscpvsfdbdbcbdwwhpmldlrgpwslzhtbpgtzscfhjlgwcgbhcbftpftvpggvcdvndqnfvfqbwrjtdcbwpsbqpzmwdhjpmjhjmlcdphrjbgsnmcmvfnrggfvttclmbvsfjpnbndbblnbdfqzmsldlswdrtzqsqppjshtlrtccthmmpjgddbbgfgthnzdffbtrpchzgbvqvjcsnpgbrzrczzmzrmhjrlvvgmsqddjsqmcqfmwnhznbczzjlpmhnfwjtrfgffsjdlwgdwwlvdpdlvszphntrvttczgnwffsdsvjmqbthgcgfjgznrfnbplbvgsjbsglhnrjpbldhmznqgqpvldvhcpmmwzfjdjdbnprtrrnwsszjhmngvmtsrqdqdsprwhjpsqwqbsdtpptwlbfbsvdgrplrvpnfbzwrdsdbvhpgwcnqvwdcswdmdltchnngpmlqvchbnrpzcnfhvlzbwbnmssbhpvvmpcwvrwzpfpssndwwfnrslpjwhwrfsswmgtszrhczcrclpldpwpghgptmzzjjjtvjcnncjpfbcvldbnlnqtsqdswcsrqcfgvwbwdvbdwwzndfvcstjbfngtqqwsbpdjdgqdlsnwgcvmmhrqcqvdbqdqczzwzlfgffbwzbfdnpvprzmqclllsdvctwjfgqbchhmsntlvnlspwtnhgshwrvzccfmfrscqwrvdccwqnrccctjrvvnqbrphrfvfrfldbbthhrdzvdmfbctsmvgwmvpdslgbcpqqdvpsjcdvmctwghdsjtmhhvdswbcvtmsnsztfghnnfhflmmnmdqpvpdplllzgqgnsjwsrgzfwhrwhcscvrgcrgjdghqjfbswtgjsvnpqznrvbdbrplwdmbqhtbcfccnpwqlsdstnpcfpbfgqrzmcqhflmcfvbbnwrrblnfslsrwpwlbvqfhgpdwzmgvftssrvdmhnmwdfqmsvqbltlmmwmjrrhgpgznqbwhcqgphvzqmntbbdhhpnlbbffjgmcdntgwmtblwlzrcdcdbtrllrdnznrrsglnwhtwbrfdrpvgqwsgzwghbtsfwqlchgsnvfmvnzntlsnlwrnjjltrpmhwnzmhrqdlvvzbfgwlwgdsgcjcjfvhbcjgzlqtsljvzcvlppqdszvdbsmgddrtmvbcpbpppcpvhzfsjrmtcpzljbhpnjjmcdwslrhslccpljrtvcscbcltpshpnrqvtdfzbbfqtpbvznvrbflwvbvrhqpzltsdrnqccsfgzzftvjfqslcnmfvwtpdbjhtzwrgvntgnfvqtdrjdgglvrnqfzsbhnvhcdbctthdrjnvwlcsjtmphpvlqjngwjnngmqqnslrrsdfpfbvsvcwjtfmwtbpnnghtvvwlphbnsgflvsfdcqrctvjfjrwqjdmbbcclwvlstbgbfqjgbpbqfwdbpmnvqnfpbhrfhwltmcszpwnvtvhrvpcqhzdppjwttlhgsnvmsrwrnwvgzpbwljjjsjzctftzftvmsstpjnzvmmrgbbpmfmfrszwjdgzfhpvsfdqbbhgvfvqrrtqwlwzwwsnnmmvmlwjzvgrwhmffzwrqwbcdtbtzpspbnqgprdqtzrpmgvnmbsnjnvtzgmhqqtrvltbsrwjlssncdppgpmzqzbzvbpjpfwmvgsbhffzpbctmqvfwhsgdjtwqhrhmgnqpvmpjzhppvcbrpwmdshzcrwzdzcjmhfvjgtbznsmdjphlssmlmbhtmnsqnjfsjwhjvgztnwhmnztqppchngdnhzwpsvqqpzdwgbhcbzvmbnqmghbhgvrqhtfzhgvqdbpvdrjsqrdnhqhrwdlczvtnzwfrqhnffwdvtrnqsmmcjtrhmgbwcmnzbbvdsrlbbtwslhghwprpglpq

src/bin/day06_1.rs

@@ -0,0 +1,7 @@
+use aoc2022::day06::process_part_1;
+use std::fs;
+
+fn main() {
+    let file = fs::read_to_string("./inputs/day6.txt").unwrap();
+    println!("{}", process_part_1(&file));
+}

src/bin/day06_2.rs

@@ -0,0 +1,7 @@
+use aoc2022::day06::process_part_2;
+use std::fs;
+
+fn main() {
+    let file = fs::read_to_string("./inputs/day6.txt").unwrap();
+    println!("{}", process_part_2(&file));
+}

src/day06.rs

@@ -0,0 +1,58 @@
+use itertools::Itertools;
+
+pub fn process_part_1(input: &str) -> usize {
+    find_unique_window_start(input, 4)
+}
+
+pub fn process_part_2(input: &str) -> usize {
+    find_unique_window_start(input, 14)
+}
+
+pub fn find_unique_window_start(input: &str, window_size: usize) -> usize {
+    window_size
+        + input
+            .chars()
+            .collect::<Vec<_>>()
+            .windows(window_size)
+            .take_while(|x| x.iter().unique().count() != x.len())
+            .count()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    const INPUTS: &[(&str, usize, usize)] = &[
+        ("mjqjpqmgbljsphdztnvjfqwrcgsmlb", 7, 19),
+        ("bvwbjplbgvbhsrlpgdmjqwftvncz", 5, 23),
+        ("nppdvjthqldpwncqszvftbrmjlhg", 6, 23),
+        ("nznrnfrfntjfmvfwmzdfjlvtqnbhcprsg", 10, 29),
+        ("zcfzfwzzqfrljwzlrfnpqdbhtmscgvjw", 11, 26),
+    ];
+
+    #[test]
+    fn day1() {
+        for (input, expected, _) in INPUTS {
+            assert_eq!(
+                process_part_1(input),
+                *expected,
+                "Expected input {} to return {}",
+                input,
+                expected
+            );
+        }
+    }
+
+    #[test]
+    fn day2() {
+        for (input, _, expected) in INPUTS {
+            assert_eq!(
+                process_part_2(input),
+                *expected,
+                "Expected input {} to return {}",
+                input,
+                expected
+            );
+        }
+    }
+}

src/lib.rs

@@ -6,3 +6,4 @@ pub mod day02;
 pub mod day03;
 pub mod day04;
 pub mod day05;
+pub mod day06;