From 076ca288f1b52a2b8045f9e1c0808542aca771cf Mon Sep 17 00:00:00 2001 From: Dendy Date: Tue, 6 Dec 2022 17:47:50 +0100 Subject: [PATCH] Day 6 --- 6/1-2.zig | 41 +++++++++++++++++++++++++++++++++++++++++ 6/input.asc | 2 ++ 2 files changed, 43 insertions(+) create mode 100644 6/1-2.zig create mode 100644 6/input.asc diff --git a/6/1-2.zig b/6/1-2.zig new file mode 100644 index 0000000..64f367a --- /dev/null +++ b/6/1-2.zig @@ -0,0 +1,41 @@ +const std = @import("std"); + +pub fn main() void { + const input = @embedFile("input.asc"); + + std.debug.print("Part 1: {}\n", .{findDisctinctSubstrIdx(input, 4)}); + std.debug.print("Part 2: {}\n", .{findDisctinctSubstrIdx(input, 14)}); +} + +fn findDisctinctSubstrIdx(input: []const u8, n: usize) usize { + // Loop through all the groups of 4 + var i: usize = n; + group: while (i < input.len) : (i += 1) { + const slice = input[(i - n)..i]; + + // See if each one of them is unique in smaller groups. + // Ex.: is 1 in 234? -> is 2 in 34? -> is 3 in 4? + var j: usize = 0; + while (j < slice.len - 1) : (j += 1) { + const needle = slice[j]; + const haystack = slice[(j + 1)..]; + + for (haystack) |blade| { + // We found a match, throw batch to garbage + + if (needle == blade) { + // We know this character appears somewhere else in + // the haystack. As long as this letter is here, this + // n-letter work will be invalid. Skip ahead. + i += j; + continue :group; + } + } + } + + // We found it, get out + break; + } + + return i; +} diff --git a/6/input.asc b/6/input.asc new file mode 100644 index 0000000..094c498 --- /dev/null +++ b/6/input.asc @@ -0,0 +1,2 @@ +bfdbbngnvnsvshhhrvrbrtbrrhqrqgrrmmdfmmqttptltntrntrnrcrdcrrctctdtwtrwwmlltcltcllmpprvvtbbmbvbsvvqwvvscswsqqgzqqppvzppnddjwddlrdlllmwllfccdfccswwrhhndhdhfdftdfdcdcllcjjbsbgssvlvrrhfrfjfpjffvnfvfwfzftztwwrhwrhwhwddpjjmhmgmsssstzszqzfqzzprpzpnndttphtpphvvcpcjppdtdwwqgwwwnhwnnvhvsvqqtrrbsscwssgwglgwlldjdzjjbsjbsbvvpbvppvfvqvbqbzzwtwbwpbbbcffdgggpnpfptpfphfhfthfthffzrrbzbcblbmmzmhhnvvqvlvwvzvtztgzznbbcqbccwhcwcnwnhndhhgcghhlthllplvppgngrgsswfsfnfjjswstsrtrhthhqzqggdtggzvvjljddqdzzrmrjmjcmjmrrwlldttrhhfjjgbglgjlldrllppnwpnwnndrddtdqdhhpccbgcgzzswzztgzzrwwzzmtztvvrtrgttvddwvwvmwvmmdjdrdtthqhgqhggldgdfdnnzjnjffmrrnprnpnssjrrbrjjrrzvrvhvllfvlvnlvvhlhrhzrzrsrswrssjvjdjfjwwjmjvjjthhnjnmnppsccmlcclfclcbllldwldwdlwddbddmnmrmgrmmtsszgssqjsqscswwzmwmbwwvqqbtbtwwpbbwdbdbhhqmqgqddflfmfnmffbtfbbsdsffspsjpsspzszccrsrstrtjrjppcrrpqqvttsbbjtbjjpbbccmzznvvzzvnvmmwmhmvmsstlssqtssvggtbgttgvtggfhggbcgcmcrmcmhhbttdlttfrfprrvttrtggcpplccqggcwwdjjjplprrbsrbbjsjbbfhbhphtttpffdgdgjddzldzlzplpnplljttdqqlmlllhzhjhccpwcwhwwbbqtqffjpfpfpjptplltbtzbbwwvggpcpprdprpbpvvgzgczzfffzcfzccjffrmrhmrhhchvhddsvswscsnnpfppdrdcrdrgdgmdgmgllhggjwggvqvmmvrrzpprhhqfhfvffvlvnlngnffbbtccfbfhfwhhhhwcwzwjjbffvrffqrrnsnwswrsrvrjvrvprpsptspttbztzfzlfzlflcflclqlplglmlqqvlvvhccmmddqvqzvvmlllvnlnhnfnwnlndnntrrhvvgjjnpnggfqgqdqqzvvclvclvlfvlvvlzlssqffmrfmfmjjczcmmmnttnfnmfnmmmhmggjgdjjqmjjvsslszlzrrpdpcpfcpfpnpssvtsvtvllbttzzljzzhrrnsnddjgdjgjljzzvhvddmdvvdtdmmpmqmnnwcwfwbfwwsvvbpvvgvnvcvdvtvrrcppwbppcqpccwqqzmqmmzczppwbbrzrjzzcrcvrrpttrjjcdjcjfcclscstthqhfqhffdcfdfqdqldddsswbblppdmdnnjvvhwvhvjhvjhjhlhcclrrcqcgcjgcjjtbtctbcbsccfwwltlrlplpfpjphplhhgtghhrppwhhrprwpwhhdqdpdwpwwtccvncvvvrpvphpssfpplcczttltgltldlmlqmmbsszdszznpprsprsprsppsbppjddjhhnrrfsrffmlmglgmlglccddpssdpsddhhfmfsfrfsfnnlggfrgghmgmrmprmprrnvrnnbqnqddhhfwfmfwfmfpfdfzdzppsbpsbpprfrvvwvtwtltvlttrhhgvhhjttmssdggnzzvmvcczmzbzwzttvtpvpcphcctmmhshjsjbssglsglgtltslscchhhsjjpljjdtdsdpppptlpprmppwdppglgmggnddztdzddzppswwmhfbpqzffjqgmsntwsnrwqrqwgpwgrbpbjwrhbcdcvqjnwslsnwhglcsjbwjhswjvzssfqgwbbdgbwfrblfmmlmsndhtlbwzfwsspqlncspqbgbnzshbwpvrmjqjzbcbzzdgssbtqdzffjphqjvrspfrjhpspbwcjwbfhqzsdnjwqjzjtjgnbrdbwqhzffphzppvlmsmppqcfjbjbdsnbwtvthwqcfrtfrwchnmqmhnwfcjtbwqwwvlnpmwlrvzwljrljzqstzglqwbzfdftzltlcbvmmfwcjqglvznztwnvzvftpndqmngqswppsnqhdbgthrddfbcfpflpndrhmcqwvnbfztsvnjjdwqgpmvdwvdftgbtvrwbnvvrwsdfzhwbwdhlpzbcqdzhbfqtpjqcmrpvcsrmcwvgghqrclfzpfgnppzmhvdhvdfrcrnjbdcwbftcqjhhfdsnfnwjzjllzzqftzsjrqnsbpjdcswhhmwwdzmvmqcjtqnczjcvzmmqwzjhjpcczgpbmcvbwmpmvnghlrgcmrrdnmjvmvnhtpfpgwgmdfzvlbclzjzwdqqcvfhhgfzdhzpdvfmwjlzzrpdgzmttmvvcplbwfzqftcgcwcgcpgwvnmlqsplpqwfnhwvqtlwcspqdzshsqnlcpqhpcpbwdhdjsmvtbqdwbcrscqfjcrcjhbjbpzbshpbmlcthmbjfwhzfphgbfqfnfztptzvdnwrpslmdtpmzmpbsszqshwdghrbtvhwzhcmpcgfqggpgzwmhhdrlhlvnpzvwwhzqvgvhrzngttcnqgjjhnblncnqnjzlwnmwnrtvwjtnrbhthncwmzwqdbdgtwrncljddnbhmphgjzfrrgmmcwfwjwjlcrhvcdtvsrvsfhmlgmzsgjchhrfmqslmdgtdtrlbhdffddvbsdbdwlwdcmcmmpvzpdtmbthjdzlpwftptpfsggmhjfjwvbwljsfhfwtbfwmczwhbmhvzllqtcqqfbrcdqqsrcpfmnswnfzfqghcmcbqwgvzqpwvvmbpddlhgjgzvgmpljznrhqphwcztqzpnhzqdgpwwclmsgpwnwtvtsjsdmcnvmjbqglttrhbzqdbgwnbsqzmsmztndrtmlpszhzgjbbftbsdwwdrlftrbbnrsqshfhdpdrwmztcqzdjlnthnjhppwntmbqdgzpmfmfnccblsdwljqhjfgtlgvpzpjbsndmwzfwrbmdhpnmbchqlwqtbhhhqqbsfnvscjwrzvjdtvbsqwzvfhwbbjgqpzcwqjdrlfmggzmhbcrhtbqdjntbtqdvmvpqflmccfpnbmnmtqbdflsgczpbsqpfphlzqgvwbjlmsgshrhpcljzdvwvdvlqqwchtjmjgtqjhgwtnddmhphwhvwhtrhfbjjjzfgrcqngnnddctzdzlqjlbdwmjqzccwrvctrzgtzqsswggbqdnplclhtdslcvzhppcjjslnshtwjnbrwdprqhdtfqmqpgfgnqtdnnhrnzfrsqhlftpdslgmmvqhvpjqjwpwgtnmgrbhwntdjftfwtjzjtprctbtsjmqmpcbbtrjvsgqgsfjprqmsmdztbhnbgzldqfzgwqwnnccgcfclctrwqmqpgvfglgsmmpjszqnphnzcnvswpsfsrmnsnlqnpmvfdvdtfgzrdmbftdrrrbfsvzfgmnffvjpcpnndrwhtjjrrvnztlfhcvfqjgfrhtbnhmwnrmwdhzmmtvjmsqmghtbtfjwdnvdcqtqjrfhrwscjftmbgjmcsrbpdpttlmvfmnfjhnptqvggnshzqnlqqdpqqsqssppbwpblhgfrwrblpzwvqphpsgfmbpqtqqpjpgnbblzstgcjhqntgpbfwlzzctqbnbvpgwsdsdldqzhvznqcsrrghpwllshqpdlqnqgzfwrnhwsvhftzplspcbqmclplprlthvwjhdndrjblqdgwvgjlbmblbmcnbzwzdlnpnhhppvrtngvqqwsttgwlvtcqmtrvpbnvcnfqdtqrsrsmhclmtgbdwwdvhwgfcqpmprcpdhqwftcchbwvstcdqrlwtgbcfqfgzprgvpbbzlqfzbqtcrlzscnqpqwtgzbbbdvsvmhggdr +