Day 6

inputs/6.small.txt

@@ -0,0 +1 @@
+mjqjpqmgbljsphdztnvjfqwrcgsmlb

inputs/6.txt

@@ -0,0 +1 @@
+wzsspbssbhshchmmrmprmrfrsfrrjhjphjjtppbfflqfqppdhdbhdhbbjgghgzgsgfsfhfhvvwcwhwwnppsbsggqnnvvtffpssjfjnnltntdtdddptprppjmmqssrlrplllfrrzggbmmlmnmtnnzddfdgfdfsstbstbbzcbbcjcvvfwwwzlzssglsgllnbnmbnmbbgmmppmwwsrrzqqvgqgnqnmmswwrnnbsnnbdbwwqnwqnwwzzqwzqzjqqwbqbccjcwwjlwjwppqfqjffwddrzrjzrjzzzhchjjlqqrggzvvnlvnvjvhvnvjvbbvdvldldbbwddtsscbbhccmbmbppbmmgjggcjjlrrwjwtjwwmffgddwvdvbdbvvhchmhmdmwwbjbjcbbcmbmmslmlslsjjrnrjrjpjcjgcjcjbbwsbsbfssjzsjsggcmcsswgssbbqpbqqdsdqqztzmzpmpbmbvbjjtrjtthwhbhnbhnbnssvpvsppgrrcwrrmqqhpphrpphchvhphqhbqbtttllsrlsrshrrmhmvvrmrnngbgnbnpbprrrftfjtjwwmrmvmcmvmrmwmssrccfbbhppjbpbwbqwbqbzzfmzmtttjbbvcvppmwwrbbzsbzbfzfdzzhrhzhvvsqvsqsnslljwllqlwllvccnttzhtzzpspqspqsqgsssvnsvshvsvqvnvlldbbfdfmmpbpgphhpqhpppchhbfbrfrllntnznrrhdrdhhdhjjgwwqhhfssjbjwjqqbffvvcrchccwmcwcllljtjrrqgrrdcrddvfvwvzzjqqcffgjgzzdhdwdssffjjhccggmtmltlhtthzhvhlvlddsfsbbtjbjcbjcjzcjjpfjfzzpnnbtbqtbqtqptpnplllbzbllhbllnqnttpddqvdqvqmmjnjggnnnhqqfcqcffqppdgpddvqddmhmrhrtrmrzmzhzpzlzqlqpqhphrpppjqqppzbzmmjgggqtggtjthhlclnclcnccmcppdcpddqrrfgrgbbhwhdhrrqtqpqjpqjpqjqqmcqmccnngqqqmtqtssnvnzvvpcpwcwwqcqqqfcqffsvsmvmttttmrrzssghgssjmsmbmvvwggggzhhfvdpgjmmvzbfjghqhrfbpmbvjzwvfmcthrqwdhghpwsspmhpqnmwhjzpnlzfnvhdnnrqwnvctbmjqzhqrpjlwrssdlwqzmsfrfzmgjhnwwnwczswnhsdbvqbmdlvntsdrhrjjcjjhpbblgwhjwdcdjtpvtmslwvncwdjbwzvbpzbvddvssnrhtshrcvnhqnpmjzfswqbbrztnwjcpflfbhnphfwmjvnvtswgfttgjcqcngmmwjlfsprwfcfwcmgrgbnqmzbtzbtbztngvrzpsnrzvhbsdjnzpwwzllgnfdrlwpmnrznqsqcmvnfbnhqjddvcjmtgbpbmsgqdqzflmlmqncmhwltrmdmgnwpfwddrdpfhsgsnggchzjhgpwrsmdzgjtrgmnprhbwbcbpzbdvvstfqcnqzbdjqpmrdbtgcthtclftghhmnrzrjqqsbndhpvmdpfpwdlhvmczvdfgvpqclssvlhqnhlcfnfbvtspdzmgzdctvpdcwchtqhpsgmmblspjdlvgblbpgrfrgnqqsphcsrgfsdmpqscbjmnqrfbcwfthdtswbzthpnvsfbntnbmmgpfzlqwhppvvdrmwbqzbgppbgsqmjfqtmntgwpnccthftwdmvwmnchlbjhsnmbhndczbrhhjpbvnjdzrcndbbmfwfwsjwfgbqhwhrsvlngsbhhlrdjzzbmjpsqhlpzwcsntjhlmngblspmsjrjwsjsrqwnrcwsmcsbmpjwrthbqhrschrmrppnnbmjbvjzlmzsrfdwqlfnfjljftjvzsqdwlhbblqcdlqjbprpcllhlhmwrbrlgfrcqshrtjpnmhljttdvpfnhdjqvjhhfczwvbzqgnzgljcfrbpgwnfhfchwzqmqqzpbcdpqmnbrppzblnnzqrfnmgtljwnfgzwvnjppdbdhbznvpgwhbdjjvlspgwgjsmfsvllpgwlfnnptmwnfsshjjvqzjwrqpvmsphpmftqdllqqdzcjwfvpftgvspprdwvvcnglmbpntghntdwpjvvsppgjvnbjgvtzchtqtwbddncsbrfcvrnvlggvwgmmnfzrswnzjrwthzmdsmzqmzsnrqsnslnhmfqljnnnzshqfqshrhhjmnhdgphctswdbhnrcgnzmmzqpjqbtdfhhltsmvvtntbgsznshhsghblhlhqpmdcfhmnfzvhgnfsfflcfwbfqzmccrjdpfvphtqbrdnzjfmfhbzqcpdnjdcgwprvchlzrcvrghgjqncjvnndbcshntrfsbsnmjlhclnzpfdgztflcpwqpnvlscfndwqzfvcmpgfncszpmwcsrdbrrhdjvmthslfvmlgpqhlgwhqnjljcvhswbsbqfrfhvzwjvdmhzsgbmbmfnbpclqdwhvrlpppszptjvwtvdmfltfqqgjttdggcvllblnnhjqnjzhvpgpzzpzwbpjqbthnjjlmsjgjzqwnjlqrcdmmvsldtcrzqdrcmwqhnhfghdlmzwcspgmlpzhbdsmlwlqnhhvcvdfzmvfwpbfmjtdllprfqzzjpbrshdzgspsrlrwrhdpmznzzqngwrzqpmtwgbsswrnnnfctjhbcftnslsqwjvmfwfdvfqcnsvfsvgstgbzpmljjtlvtnfsdzpvcgbjqwgbgzqbjfgltqvnhffflsbjzfqfrfbssrvvwqvqptmhrbgllqjwptrzgvqgccsrvbgtvmzfzlmtqrgfwhzddsptclbhjlwqfntvjqdvcddnffmbtqrnsvtmlvljcqdsrpggcmqvmmlzwwbgznhblwzjdppvtqzjvcmtfzhdzjplrdbrfrgzpldvnsgqlbwbmfvrbgwzmjmmqdfgwtbgtzmdqnvqbwvcfjhddqvnjtjlhhjnltbtqqvblwlmglrqcrcfjvdntrnqzzbmrjqglmrdcjgnshcghtprjqqsdrmgdnzmzcfqqdtjtrqgtqtgrpmmgzjtcrznmqccjbdpbvrnnbmbzvgdcnrczbctbrsrrqrjnfcdpzlnngwvcdtbbgssvhpptntqdzhcqtlpvzjbfgzggrgrcgtdfjbwdcrpztnfcdbscnlmqmwcbmtnddgbmhwsgvcfdcmhlsvtnqtmrnsjzhppgwvzlmhwwmpfjzrfbhsgntzrdhwswrnfmmmczqrvdrqnhgrvqbdddhglwsftsljvgbnjqfwfzsspdqvgsnlgfsfpvdrjhzcldtrmjjrmdhvvfrjldhhtqnvsvlldjpjbpwstfsmrpmbqbnnpvqtbgjvblthbmwqtfcfgnjscvtbvlqcmlhffpzgjzfscsqwnhrjhvbrrzwqvbjwtwhtqsdbssfgncppnsfgfltdcbjqjzqqtprsbvjzhmchnltvmbsvpvhgzhfhbrnttsqbcmwpdnwqqgdrjrdwdhtzwsmcdffqgsddvbzfjhtfhtnfdbfrwmdtcqshfjrcpswzcptgwgmctpmzjdbqlmqwthmnfplmctpsslcsdtqpqhjtmjdnmnqnjgchwstsmtpvsmgpsbfgwqnzhrdgdvcdlcldfcmjvsdldgbmhltjhczffwmzqssnhfnwftfgpshntjbpjdffjpcmcpwhclrrwqcqzmntjglzgcfrplfpvprtpvpjdlcrfwrtrzdzmhsrsmdcpqqrqgvfpdbmzbzqdfhpplmgfrdghclbclgswvwhhdvcpmpzflpffmptcrwglftztccrpbrvmpnqmqdgjgrrlbtqtvgcjpljttwtdslqjqlsdpblgrqbrtbmtblfbqtbvsqhpqzpqfhjqpmjrmcvqmsbbpjpdncgnjftclbltwszrrfzqbjcdtphcvpmbhppvwjwlprgmghrjzzgnvzlvghnjbzqjpdgzfsnjchpbzqdzpsjmsrvvqwjcpwznlpbjldlrdfqtrzhqzcnpjqbbbf

src/main.rs

@@ -184,9 +184,30 @@ solutions! {
             let rules = make_rules(&input[midpt + 2..]);
             run_rules_9001(stacks, rules).into()
         },
+    ],
+    [
+        // day 6 part 1
+        |input| {
+            find_start_marker(input, 4).into()
+        },
+        // day 6 part 2
+        |input| {
+            find_start_marker(input, 14).into()
+        }
     ]
 }
 
+fn find_start_marker(input: String, window_size: usize) -> u64 {
+    for i in 0..input.len() - window_size {
+        let window = &input[i..i + window_size];
+        let set: HashSet<char> = HashSet::from_iter(window.chars());
+        if set.len() == window_size {
+            return (i + window_size) as u64;
+        }
+    }
+    unreachable!()
+}
+
 fn run_rules_9001(mut stacks: Vec<Vec<char>>, rules: Vec<Rule>) -> String {
     for rule in rules {
         let total = stacks[rule.from - 1].len();