main.rs

use std::fs::File;
use std::io::{self, BufRead};
use std::path::Path;
use std::collections::HashSet;

fn main() {

    let input = "mqllsjlslffbqbsbpbcbdbfbfvbfblfltffpddsmmhjmjvmvsmvvjfvfjjfccblbddhrdhrrlcrllrrswwlpwlwwgrglrgllrrlsshffrwfwcffmrrdfdrrncrnnlvllbsbcbwcchsshsrhhbnhbbqbmmmfdfvvqpqlpqppfgpfgpfpfttwrwwwfmfpfpmmpgglwglgfgsfgsggdllfhhmchmhttlhlchhrzrszsqqqzdzrrbbpgpccmfcmcbcdcrdrzzvjjgjfgfqfcqffvbbjbjbjsbjjbhjjzjlzjznzbbjvvpssdfdvffssrffpzfppsddgwgzgccrmrmdrrzpzbbjlbjlbjbgjbjmmtmllqffpjfppzzztfzfzfmfnndmdtmmhgmmsdshdhppbnpnbpnpdndgdbdwdtwwzqqjwjpphnnjddlglzlczzdpdjdjtjtgtqtptrrbqqqspsfswsdwdjdsdcdllpzpqplqqjnjrnnvrrnrccnwnnsttqzqcqppvmvdmdjjpnppljppptpzzwbwrrqgqhghshlslblflhflfbbwhwlhwhbwbdwbdwwzlwzwhzwznwwmmrddlttdrtrsttqbqtqtdqttqwwglwlbbdmbmcbbwbnbtbmbggdqqnhqqptpdtttvcvmvmdmtdttcwclccjcrctcllrprlrqqzqccttgnntstrtqqtfthtghhvcczhhctclljcljlcjcdjcdchhmjmjjrsjszjszsbsqqpfflqffqvfqvqjjnjtthvvvcjcjrcjclcwcrcrjcrchrcrggcjjpjjbwjbwjbwjwsjjrssfggzbgzgzrzmrmwmrrczcppnmnmzzgtglljlhjlhhgzgtgddrrhvvvlhlwhlhzzgzfgzzbvbvrvllplnlqnnfvnvgvdgvddsdqsdscscjjjvrvpptgpgdgtdtdzdtztfzfszfftjftfmftmtftddjzdzssfllfsllpwpwswrwdrwrcclczlclpccdrrftrftrtltftnftfnfrnfrfgfjfttrsrqsshlhdhnnztntwwnwppwbbmrbbtntznzggthghfggttpnpnpbplpvvpmmpwmbgcpwgsfndbrclcwbdcfhlcqblplglnqpnrpjqbddfqlqvbzrtwbwzvwqntcgmzrzztlffzmfmcmfzrmcvfctmlrlbtbpsgddbqrlblsslsbcmcglzdzjzlpgzprbrmfmlzrssqddzfjzfgbpvdgrrnldmtqgtjppqqwtzbltpfgpqtdqpwhbbwblnvvpmnljdghwrbnphswhgcvhpcplbbmwprznzzwnfntfplscpflhwdmlvfwtgrjhchnmnqbfgvsglllnnzwchqtcrvqzzhttcmblcthqrjdbvpwptcqtsnwrnfbbsqlshhtqdvcfcgdlbgzqjvzvglbcdwzpzttjnsvwrdldcqqstnnfnjthncgfvggphgfgstnmvnbmtvhpmsgmrccmmslqmjfzdjnbcjbjnpmsnvmzrphhjrdrrssnclvwbnzvpccqglnpljdtwrlnvpqzlshpcmfnmrjchqvlmthqbdrlnnpwcmfnwfzpbpnrsdmrqgqsjgwttwhgqlwghjntrvdndfhdwfzbwnmbjlzbhhdqfrdtwcjjvfnjbqdmdwncfhmslflvhqdmrcdrcdrldnqdmhzsvlglgflmlhwjqvfjdmqbmgffvdmmsbrrnrlcsbncvsjffttmhnbpwmqrnvdmzhztbbsrtwgfshjnlvhqvzwpvrmqfbsszswvrglnmwlmcdpjvmqsgnjshspzwrwctwwghmgjvbthcqcrlflsnrnpwvbnghrhvzpzchjlcljplflzqdvglgtvczhnbnlqltblddslqmdpvfbstvszqdsjvgfqlmdgbsnlzlrnbbqqfqjfqhljzlpbbgbnchwljjcpzbhdmwfzmqstcwtvgtvwcpgvmhpsngrshjvzzngbhjqmcfgjjzgdzcsbsvfwmznmwnnvlbntvcmgphqmdfjvhrlldcpwgnmbpjlqflvsrwqphvlpzlsdthfzdzvlphzdbqldvggsgrcmmfmfnjsfszqqbhnmntfgrbfwtlpqgwnrcqdsmqpqbtfdsnhbdcbwcdrhrfgsctrnlchrrnlptbcnqhndcpcdrgtznqrbgjlwzsjhblptncwtqcqcbzccrnjcmfvfnzwlrgdtgcvvcprwvnrrbdjzfnlvlqfpgbpwsvcnmnmmhnshtjgrcnscljwncdjqtwhlhvcggnwbzlzvfqmcdhmzddrdhvnnjbzbtnrgqcbmzhzzfldhlwwsgztfhncgctvjvszdzhrqmzvffmhvsqssjjvrrmtwqswhwjqgbfghbgfmgqssfhbcrglnbstfnqzvwqcznzgtnvjdvhtrlmgthcrqcwbjnzddsqhzwmdwndqcplhvpbpsdthngqwmlfqfndfqbpbwwrvsrnsjbsrwjdjbcqcvdfcsscgblggwggtmbntnbmmswfhvzhltwvprdgvzwltchhzsqlpwdndwftmsgbfwbpmhsdjhwbvvpzlpspsrsnpbwtdspfvdqdjfjbzmmtbnpzrqngccrbfndnjbcjfvwjvfjdvmsqdvgctzvpzmjmjvggpqfmmrsvqbrrlwrmzhmhpcmpltwdbtmwgzrrvsdhvhlwzggjwqzpbzvzrdbptzhzcrrjwjmdwdpsfwfspjgtmfcvddgspldbldtbtwrzdsjrbhvvcjgnrsbzvbrnqjwhrzgfsbdjlfqlszvlnrbfcrgfwrsmqmmnrwbtvfdpjzpfbhplfdsrwwgqqtgnzvddbgjjllmmcjjlglwmsbwrdrnnznwzplnbhlrlnmnllwgwgdpqdqqlmvsbgcshsmntrrlrvdhjgctzsfhmvfqtthvvchftflhlqqhhhbhqvgwtcmgcfwldhgptfddpsqrfzqmtpszswfrztzfsspltcvjwwsljsnjpnnqggscwwmcwfrljlrtqwqvplthsctvbndjfpnvcbdngzqtgjvwlsdhthdwmjvtnzrplwzwsfmgszpqjcjttslsmtbbvhjgpqmqfjbcccsnrlwmjhbsqgzqldmlhnbjnjfwmgzpvdcwndbwcncmtzccngcghhpwmjnncfgqtdtzwmhbdrpwsfbnjzfnwzwqncnlfjqjrjhgnqgvbcdhgdnbwpqjcfgprmfhzlrqtwlqpshfrgdszrwdtqfcntrzbgzlvrhtlsbjjwtnlqllnsvbzwjlmqvdgvtslmbwwcfstmqntwwwsjmrflrqnttfzjchpgwczzdtqbhdrtrpvhhbscvjtdtrhbstpqrnrzszwvcqzhbrzhlblvzrgwtqzbslbmgdqhpfqrdqrzcsbglcsshcwvlcpgjtjmcgpmsnldjzlwnrqlzzznpvmgssvzshjvtsmmzvstpqrhfvttnsrddfcqcbwhgpfdtlhcvcgjgdrvvntvdjqpvwvfmphhpzjgmshddqfsbpjbzrfdjnwrhmgcfbccmzqgvrbmcjdpvwfrtdpbwvjtjcrmnpzrrqbbvbsgcplwmlbsdwptbprlczjcqhdzprpttvnthbmtscdtjvrnwqhnvqbzvwnphnzwlgvvjhddjvjrvwlmhqcsffcnhgjzdjppqqwbglbhgzsmvzwjdvbqpztphshtrbrrhzmdlfdtssbhrcltwlqpzvpgbsgngpfjsjbrnnlzctqcqzwswhfnjjngwsztdgmmcffqfhbsgwstnflqjqttzbtgjvcfrrdwzcvhwjnhmtphszrsptjsqqwcwfnmtlzvzsqsmghtztrpvdslrmjqqvwfmzlwwjbwtpmhtqcfctdztsnfrhfqwqcjdzmjhvwwgrslmdqqwgwfvwlzzsznmdrzgcvbmrtcvjsqlftnpdhwmrzjwsnjjdrczbjcwhwlrtljwjsfmcfcrsjflsldbjrzpdgltmhtszzznjjlfqmgpbjfjncvtvlcfsmltbsvsrgdhwwhcpbdbntqhgjztvlwtwdsgqfwtlcdzffcszjmjvj";

    let mut last_four: Vec<char> = Vec::new();
    for (i,c) in input.chars().enumerate() {
        last_four.push(c);
        println!("{} {c}", i+1);
        if last_four.len() < 14 {
            continue;
        }

        let mut set: HashSet<char> = HashSet::new();
        set.insert(last_four[0]);
        set.insert(last_four[1]);
        set.insert(last_four[2]);
        set.insert(last_four[3]);
        set.insert(last_four[4]);
        set.insert(last_four[5]);
        set.insert(last_four[6]);
        set.insert(last_four[7]);
        set.insert(last_four[8]);
        set.insert(last_four[9]);
        set.insert(last_four[10]);
        set.insert(last_four[11]);
        set.insert(last_four[12]);
        set.insert(last_four[13]);

        println!("{}", set.len());
        if set.len() == 14 {
            println!("Found! {}", i);
            break;
        }


        last_four[0] = last_four[1];
        last_four[1] = last_four[2];
        last_four[2] = last_four[3];
        last_four[3] = last_four[4];
        last_four[4] = last_four[5];
        last_four[5] = last_four[6];
        last_four[6] = last_four[7];
        last_four[7] = last_four[8];
        last_four[8] = last_four[9];
        last_four[9] = last_four[10];
        last_four[10] = last_four[11];
        last_four[11] = last_four[12];
        last_four[12] = last_four[13];
        _ = last_four.pop();

    }

}