doukaku12_1.js

"use strict";

var mapData = [
    "?????????????",
    "?ABCDEFGHIJK?",
    "?LMNOPQRSTUV?",
    "?WXYZabcdefg?",
    "?hij?????765?",
    "?klm?????432?",
    "?nop?????10z?",
    "?qrs?????yxw?",
    "?tuv?????vut?",
    "?wxy?????srq?",
    "?z01?????pon?",
    "?234?????mlk?",
    "?567?????jih?",
    "?gfedcbaZYXW?",
    "?VUTSRQPONML?",
    "?KJIHGFEDCBA?",
    "?????????????",
];


function solve(input) {
    var x      = 1;
    var y      = 1;
    var vec    = [1, 0];
    var result = "A";

    for(var i = 0; i < input.length; i++) {
        var c = input[i];
        if(c === "L") {
            vec = [vec[1], -vec[0]];
        } else if(c === "R") {
            vec = [-vec[1], vec[0]];
        } else {
            var len = parseInt(c, 16);
            for(var k = 0; k < len; k++) {
                x += vec[0];
                y += vec[1];
                if(mapData[y] && mapData[y][x] && mapData[y][x] !== "?") {
                    result += mapData[y][x];
                } else {
                    return result + "?";
                }
            }
        }
    }
    return result;
}


function test(input, expected) {
    var result = solve(input);
    if(result !== expected) {
        console.log("-------------\ninput = %s\n\nexpected = %s\nresult   = %s", input, expected, result);
    }
}

test( "2RcL3LL22"                        , "ABCNYjmpsvy147edcbcdef" );
test( "L3R4L5RR5R3L5"                    , "A?" );
test( "2ReLLe"                           , "ABCNYjmpsvy147eTITe741yvspmjYNC" );
test( "1ReRRe"                           , "ABMXilorux036fUJUf630xuroliXMB" );
test( "ReRRe"                            , "ALWhknqtwz25gVKVg52zwtqnkhWLA" );
test( "f"                                , "ABCDEFGHIJK?" );
test( "Rf"                               , "ALWhknqtwz25gVK?" );
test( "1Rf"                              , "ABMXilorux036fUJ?" );
test( "2Rf"                              , "ABCNYjmpsvy147eTI?" );
test( "aR1RaL1LaR1R2L1L2"                , "ABCDEFGHIJKVUTSRQPONMLWXYZabcdefg567432" );
test( "2R1R2L1L2R1R2L1L2R1R2L1L2R1R2L1L2", "ABCNMLWXYjihklmponqrsvutwxy" );
test( "2R4R2L4L2R4R2L4L2R4R2L4L2"        , "ABCNYjmlknqtwxy147efgVK?" );
test( "R1L2R4R2L4L2R4R2L4L2R4R2L4L2"     , "ALMNYjmponqtwz0147eTUVK?" );
test( "R2L2R4R2L4L2R4R2L4L2R4R2L4L2"     , "ALWXYjmpsrqtwz2347eTIJK?" );
test( "R3L2R4R2L4L2R4R2L4L2R4R2L4L2"     , "ALWhijmpsvutwz2567eTI?" );
test( "R5L2L5L1LaR1L4L5"                 , "ALWhknopmjYNCBMXilorux0325gVKJIHGF" );
test( "1R2L4L2R4R2L4L2R4"                , "ABMXYZabQFGHIJUfg?" );
test( "2R2L4L2R4R2L4L2R4"                , "ABCNYZabcRGHIJKVg?" );
test( "3R2L4L2R4R2L4L2R4"                , "ABCDOZabcdSHIJK?" );
test( "4R2L4L2R4R2L4L2R4"                , "ABCDEPabcdeTIJK?" );
test( "5R2L4L2R4R2L4L2R4"                , "ABCDEFQbcdefUJK?" );
test( "LLL1RRR1LLL1RRR2R1"               , "ALMXYZ?" );
test( "R3RRR3"                           , "ALWhij?" );
test( "1LLL4RRR1LR1RL1"                  , "ABMXilm?" );
test( "R2L1R2L1R3R4"                     , "ALWXilmpsvut?" );
test( "7R4f47LLLc6R9L"                   , "ABCDEFGHSd?" );
test( "5RR868L8448LL4R6"                 , "ABCDEFEDCBA?" );
test( "42Rd1RLLa7L5"                     , "ABCDEFGRc?" );
test( "RRLL6RLR1L5d12LaLRRL529L"         , "ABCDEFGRSTUV?" );
test( "RLR7L6LL1LRRRcRL52R"              , "ALWhknqtuv?" );
test( "1RLR8RLR1R437L99636R"             , "ABMXiloruxwtqnkhWLA?" );
test( "LLL2L3La9Le5LRR"                  , "ALWXYZOD?" );
test( "R1LcRR491"                        , "ALMNOPQRSTUV?" );
test( "R8L1R1R512L8RLLReRf"              , "ALWhknqtwx0z?" );
test( "1RcL8f1L29a5"                     , "ABMXilorux036fedcbaZYXW?" );
test( "R822LeL46LL39LL"                  , "ALWhknqtwz25gfedcbaZYXW?" );
test( "9R3L5LRRLb5R3L7cLLLR4L"           , "ABCDEFGHIJUf65?" );
test( "7LLRRR2R3R69Lf76eR2L"             , "ABCDEFGHSdcbaPE?" );
test( "8RRRLL3Le"                        , "ABCDEFGHITe765?" );
test( "8R5RLL6LbL4LL5bL"                 , "ABCDEFGHITe7410z?" );
test( "6LR2R1LR5LRLRL484L63"             , "ABCDEFGHITe741yxw?" );