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Advent 2023 Day 7, 8 & 9

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Jos van Goor 2023-12-09 15:20:29 +01:00
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LRRLRRRLRRRLLRRLRRLRLRLRRLLRRLRRLRRRLLLRRRLRRRLRRRLLRRRLRRLLRRLRRLRLRRRLRRLRLRRLRRRLLRRLLRLRRRLLRRLRRLLLRLRRRLRLRLRLLRRRLRLLRRRLRLRRRLRRRLLRRLRRRLLRRLRLLRLRRLLLRRLRRLLLRLLRLRRRLRLRLRRRLRRLLRRRLRLRLRRLRRRLRLRRLRRLRRRLRRRLRRRLRRRLRRLLRRLRLLRRLLRRRLRLLRLRLRRLRRLRLRLRRRLRLRLRRLRLRRLRRRR
FPF = (PTN, MPT)
DGM = (KXM, PRM)
FKB = (JLC, MBX)
XCJ = (DCJ, TSH)
JVH = (VCH, SMV)
BXL = (HLB, NVF)
GVD = (FSQ, MFD)
CDJ = (SMM, HHS)
BGM = (FHB, LKH)
FBP = (HHS, SMM)
LTK = (TCV, GQX)
LDM = (MRM, JKJ)
RDK = (KBL, GHP)
BJB = (XBN, BXG)
KST = (BGX, VFS)
VKM = (MFR, CJP)
CSG = (GGJ, JHH)
JFS = (QCG, XFR)
MDV = (FPQ, NRX)
QHF = (PJP, QHX)
DHM = (LJC, PDS)
MMV = (CHS, FXX)
CQP = (LFN, GSD)
RDT = (NVG, NVG)
XFN = (HFM, LTK)
MFD = (RKJ, XGN)
DTD = (JBV, JBV)
KJG = (PCC, PPR)
GLH = (JRN, BLK)
KBV = (MCQ, MCS)
LQF = (KDR, GFC)
GGB = (JGL, RRM)
BQX = (QKQ, NSG)
SVS = (SQL, FXL)
GMC = (BHG, GPC)
KPZ = (HLV, RVH)
RQB = (TDV, XPN)
GVR = (SXD, QRB)
MNX = (DLT, CMJ)
QDM = (TKN, VDH)
CCB = (KPR, QCK)
BVF = (QJX, FKK)
TJB = (HKV, BCP)
BHC = (SSN, HHH)
NTN = (RPT, PVF)
NDP = (BJQ, MGH)
PJP = (NTN, FSR)
BLL = (MTQ, SNQ)
RNP = (RTD, PGM)
PVF = (BMP, LPM)
QFL = (NNS, GLR)
VRG = (GGV, DMG)
XRX = (TTR, LXS)
MBH = (RHX, GKF)
CXD = (LFN, GSD)
FFK = (LDG, VHS)
NHM = (BLM, XQD)
TNB = (KSS, FSB)
VLX = (KCF, VXL)
DDF = (TNK, FBS)
GQR = (BGM, MGR)
BPQ = (FHD, MJT)
KPR = (SDL, NMQ)
CNL = (QFP, XPV)
HVA = (BRQ, XPL)
PHF = (LHF, HVR)
TNZ = (XCM, BFL)
NDJ = (GCQ, RTL)
HCT = (PQT, VVB)
JNH = (GVV, JMC)
CNV = (SDP, NQR)
GGV = (RHT, SLG)
PRX = (FSD, KST)
BLM = (KKQ, CSG)
JRN = (GGK, GBF)
DJK = (GQJ, JKB)
RVH = (FXJ, JVN)
RXF = (CHG, GDT)
MBX = (KJM, XFN)
HLV = (JVN, FXJ)
XDG = (HJM, KCT)
LPM = (RCG, RHG)
GLP = (XDM, XNC)
HQP = (JXQ, XPT)
CXF = (SCV, PHF)
QJT = (FJN, GHV)
MPL = (HSQ, FKN)
SDP = (LCQ, GRV)
CDQ = (JLV, LLD)
HHA = (BFL, XCM)
GPS = (VLX, CPL)
BXZ = (KSN, VKP)
PGM = (LJV, CDQ)
PKG = (VQF, FXC)
XPL = (LBN, DMV)
BJJ = (TVV, MNX)
HLB = (SNN, HNH)
CDV = (TNB, FSN)
FXC = (CLF, HSC)
JFM = (LSR, CNL)
CMV = (DHQ, DJR)
LDN = (BCQ, JMS)
XNC = (JLS, KXS)
SNN = (NGM, MFJ)
CND = (RDL, GJJ)
SKT = (FCM, MRC)
QRB = (BCG, HRR)
XNK = (LJC, PDS)
DGK = (KBF, SRB)
LNL = (FSD, KST)
PCM = (PDL, JFS)
BSV = (LSR, CNL)
SMX = (TKL, QPF)
XMS = (MDB, PKP)
XPT = (LDM, PKV)
RLB = (XFT, PKM)
VVV = (NRX, FPQ)
MGB = (LNN, NKR)
SFJ = (LFT, QDM)
MFX = (GLP, RPN)
DLX = (SQQ, NHM)
XQC = (HQJ, NPC)
GHF = (VNG, TGQ)
LRX = (GDT, CHG)
SHV = (SRM, DVJ)
TQS = (PRD, HGV)
SQK = (QNB, PSJ)
CHS = (MXK, GCR)
VDH = (FMX, XMR)
DGN = (LGT, PNQ)
RMM = (CFK, RQD)
RQK = (FSN, TNB)
SLH = (BDS, BBP)
HVR = (NTS, NQG)
PSJ = (JFK, XXM)
GBD = (VMR, KJG)
FRH = (MNX, TVV)
THH = (GHF, MNF)
XTP = (VPC, BQQ)
VMR = (PCC, PPR)
PPQ = (GJJ, RDL)
VHK = (TXT, DDN)
JCG = (CCD, BXL)
LCQ = (MPF, NDP)
KCR = (PFH, DJK)
LHL = (LGL, KCR)
JMC = (RBG, CGH)
JPM = (XMS, CVR)
CLF = (HDT, DHR)
FSQ = (XGN, RKJ)
DVJ = (VHD, XNM)
KCT = (SKT, QLK)
XFD = (HXR, JVH)
BVA = (GPT, RSD)
MGR = (FHB, LKH)
PXV = (MJJ, VBK)
FNG = (TQS, HHM)
GFD = (XRG, JCS)
SST = (PHP, JGC)
KJV = (DMG, GGV)
PQM = (TTX, RMM)
XRT = (KBL, GHP)
JLV = (NKV, BLL)
FKS = (CBR, RLJ)
HMD = (JNH, GXG)
FRL = (KQX, DDB)
TRP = (LXT, HMC)
TNK = (FRN, FRN)
KDR = (PRX, LNL)
XTS = (NDJ, HFB)
HVM = (FMG, FHN)
CHH = (TMD, MNM)
HHM = (PRD, HGV)
PJC = (FCC, VJD)
TSH = (RPR, CVJ)
GGJ = (NFK, NXD)
DMG = (RHT, SLG)
QPT = (QFL, PFN)
DDN = (RHP, NSS)
XHJ = (BPQ, CSM)
NNM = (KHG, SRF)
LFL = (TMN, JCG)
NKV = (SNQ, MTQ)
TMH = (LGT, PNQ)
CCD = (HLB, NVF)
GSD = (MRB, TFS)
RHG = (VXH, MXS)
LFT = (TKN, VDH)
BJV = (DST, PTK)
CGD = (PKG, ZZZ)
VNG = (BJV, HDX)
HJS = (GPC, BHG)
FRN = (VKP, KSN)
MRC = (JKK, CMV)
BQQ = (NBF, PJC)
KSN = (FNJ, GVR)
QNB = (XXM, JFK)
RSC = (JCB, JCB)
GCQ = (XGH, FKB)
SHS = (JBV, DDF)
LLR = (XHJ, PGB)
RSA = (RVH, HLV)
DMX = (GSH, SST)
HRD = (HLK, DJG)
LHF = (NTS, NQG)
JMS = (FKS, HPB)
SRB = (SRG, GSF)
LHN = (HLK, DJG)
DTM = (RXM, VHK)
PNP = (SNC, LPF)
MPF = (BJQ, BJQ)
SCV = (LHF, HVR)
BTV = (GLH, PNN)
NJG = (RXK, NXB)
NGM = (THG, TXQ)
FXL = (XRX, MBV)
NHJ = (DSX, NNM)
RBG = (DGK, LFQ)
HGV = (HTS, RNP)
LDF = (KRB, NXC)
PMR = (GNH, CHQ)
DVM = (MNM, TMD)
FBS = (FRN, BXZ)
BMM = (XSK, DDK)
GGK = (MXH, JNG)
NXB = (LHN, HRD)
PNN = (JRN, BLK)
PSV = (LLR, KXX)
KGK = (TJP, QMM)
CVG = (VLX, CPL)
QNF = (XPB, PCM)
HTS = (PGM, RTD)
FJN = (DTD, SHS)
JXB = (CLX, KPZ)
DLT = (JGH, SFD)
SFV = (HJM, KCT)
GSF = (DLX, CHL)
TKN = (XMR, FMX)
LJB = (QJT, FVJ)
QFP = (NXL, DGP)
PKV = (JKJ, MRM)
RHX = (RDK, XRT)
KDP = (FKN, HSQ)
RLJ = (BGF, JRP)
VQR = (FDK, RLB)
XNX = (HGQ, HGQ)
DSX = (KHG, SRF)
PDS = (VQK, KNJ)
GKX = (TKL, QPF)
CHQ = (XSM, HMD)
KXX = (XHJ, PGB)
MDB = (VVV, MDV)
BCG = (XJX, SQK)
KJM = (LTK, HFM)
HRR = (SQK, XJX)
GXD = (JFM, BSV)
SCR = (JDN, QRS)
GMK = (FPF, CTM)
KXM = (PDJ, MFX)
DKQ = (GCL, QFN)
DJR = (FGV, PSV)
GQX = (DFL, LQF)
PTK = (TRS, TMC)
BLK = (GGK, GBF)
RSD = (XDG, SFV)
SVT = (PXV, XCL)
XFT = (BJJ, FRH)
LSR = (XPV, QFP)
BCP = (NMB, NXM)
KGP = (RDT, FNB)
DHF = (PNN, GLH)
JHH = (NXD, NFK)
DGP = (GKX, SMX)
KSK = (DKP, RXT)
KRM = (PQM, DCK)
XJX = (QNB, PSJ)
JKK = (DJR, DHQ)
CFK = (DGN, TMH)
PSS = (HNP, STL)
MFR = (PMR, RJS)
JNG = (TQQ, HXB)
MDG = (VCC, HTF)
VCC = (DGM, MKH)
TQQ = (FCQ, SCR)
DMK = (GXD, GFF)
GHV = (DTD, SHS)
HLP = (NNH, TQN)
BGK = (QHJ, BQX)
VKN = (DPT, FNG)
STL = (DPP, NMX)
QFS = (MGR, BGM)
HSC = (DHR, HDT)
FPQ = (NSL, RQN)
QMM = (CDJ, FBP)
PDL = (XFR, QCG)
PDJ = (GLP, RPN)
FSD = (VFS, BGX)
MPT = (DKQ, RSQ)
MHQ = (NTL, TKG)
MPC = (NQJ, NQJ)
DST = (TRS, TMC)
KHD = (CLX, CLX)
BNT = (MFR, CJP)
VJD = (GPS, CVG)
DLG = (JCS, XRG)
MCD = (CHH, DVM)
VSG = (XPR, TVQ)
MSX = (VQR, KXQ)
VMV = (VQR, KXQ)
QCG = (NHJ, NMH)
RPN = (XNC, XDM)
NVG = (RSC, RSC)
GDT = (LDC, QPT)
GMX = (RJX, VRM)
RDL = (MBH, NTF)
XXM = (JSC, MHQ)
SRF = (BGK, NQF)
XNM = (SGJ, XCJ)
RPT = (LPM, BMP)
GPT = (SFV, XDG)
JCB = (BFL, XCM)
QKQ = (FRL, GGT)
MTQ = (LQB, XPG)
CHG = (QPT, LDC)
FMS = (FJX, GMX)
MBV = (LXS, TTR)
JFP = (XPN, TDV)
JFJ = (HNP, STL)
GKF = (RDK, XRT)
LDK = (QCT, TVX)
CLX = (RVH, HLV)
TXQ = (DFR, KQF)
XGH = (MBX, JLC)
KFB = (SHV, MRV)
RSV = (GSX, TPK)
NKR = (KFB, TFN)
FCQ = (JDN, QRS)
RQN = (TLC, GFQ)
FSN = (FSB, KSS)
QDQ = (VBQ, GSM)
FFC = (DKC, DMK)
KBC = (BHQ, TRP)
PHB = (VCC, HTF)
GBH = (FFC, CGL)
TTR = (KBV, LJP)
MRB = (DHG, QNF)
SDL = (PSS, JFJ)
TMC = (BXK, RSV)
LXT = (GGB, MDT)
LQB = (BNT, VKM)
RXT = (GBH, SSD)
SSN = (CRH, XTP)
MRV = (SRM, DVJ)
FJX = (RJX, VRM)
FQB = (MNF, GHF)
DKC = (GFF, GXD)
MGQ = (LDK, RVG)
DLK = (FPF, CTM)
FHN = (HKK, BVF)
BFL = (LJG, XQM)
PKP = (VVV, MDV)
QHJ = (QKQ, NSG)
BCQ = (HPB, FKS)
LDG = (VMV, MSX)
BFH = (RXT, DKP)
XPB = (JFS, PDL)
HDX = (PTK, DST)
NQF = (BQX, QHJ)
DPT = (TQS, HHM)
DCK = (TTX, RMM)
NPC = (KGP, QJG)
BCD = (NXB, RXK)
HDT = (HPM, FTQ)
FHD = (XNK, DHM)
NNS = (XFD, MBT)
GSX = (VRG, KJV)
BXG = (BFH, KSK)
VVB = (QDQ, JXC)
NVF = (HNH, SNN)
KRB = (JBH, JNJ)
FXX = (GCR, MXK)
JXQ = (LDM, PKV)
MTT = (DLG, GFD)
HXR = (VCH, SMV)
MNM = (SPQ, PNP)
QJG = (RDT, FNB)
JLS = (KRM, LBQ)
CJK = (TJB, VDD)
TXT = (RHP, NSS)
FXT = (JMS, BCQ)
NSS = (LRX, RXF)
VJQ = (RSC, MXR)
XXH = (LNN, NKR)
NSL = (GFQ, TLC)
XSM = (GXG, JNH)
HFM = (TCV, GQX)
JGC = (NDL, JPM)
HGQ = (GPT, RSD)
CHL = (SQQ, NHM)
VBK = (GKG, XTS)
MBT = (HXR, JVH)
FNJ = (SXD, QRB)
JBH = (HCT, SGG)
JRP = (FXP, VKN)
VRM = (MPC, GQP)
BBP = (JCL, LDF)
GXH = (RXM, VHK)
MXR = (JCB, TNZ)
BSD = (CCP, GBD)
QFN = (MPL, KDP)
LNN = (TFN, KFB)
SQQ = (BLM, XQD)
MJT = (XNK, DHM)
GSH = (JGC, PHP)
PQT = (JXC, QDQ)
RVG = (QCT, TVX)
DHG = (PCM, XPB)
LKJ = (HQP, HHG)
XHB = (SJL, DMX)
GKG = (HFB, NDJ)
PGB = (BPQ, CSM)
VBQ = (CVS, QHF)
JXC = (GSM, VBQ)
QCK = (SDL, NMQ)
PFN = (NNS, GLR)
RXK = (LHN, HRD)
BVX = (GMK, DLK)
LPF = (MMV, LQK)
SMM = (SFJ, KGR)
SJL = (SST, GSH)
HMC = (MDT, GGB)
VQF = (CLF, HSC)
NRX = (RQN, NSL)
CBR = (JRP, BGF)
JLC = (KJM, XFN)
TMD = (SPQ, PNP)
HXB = (FCQ, SCR)
SBQ = (SQV, NCH)
LGT = (MGB, XXH)
HSF = (TJB, VDD)
JBS = (MGQ, NVQ)
DKP = (SSD, GBH)
HSQ = (SVT, LKV)
GPC = (HVM, TGC)
TVV = (DLT, CMJ)
BHG = (TGC, HVM)
CGR = (LDN, FXT)
PFH = (GQJ, GQJ)
FCM = (JKK, CMV)
RRM = (KJP, BMM)
FCG = (MDG, PHB)
MCS = (HLP, DNV)
BXK = (GSX, TPK)
VQK = (HJS, GMC)
LDH = (XPR, TVQ)
DXN = (GMK, DLK)
GFQ = (RQB, JFP)
PKK = (BBP, BDS)
BBR = (FXT, LDN)
BJQ = (KHD, KHD)
RCG = (MXS, VXH)
HPM = (KJF, CXF)
QJX = (CDV, RQK)
NMB = (RKC, GVD)
JCL = (KRB, NXC)
GXM = (BBR, CGR)
NMX = (XNX, SQP)
NXM = (RKC, GVD)
QMT = (MDG, PHB)
DMV = (LTG, SBQ)
FTQ = (KJF, CXF)
TCV = (DFL, LQF)
MFJ = (TXQ, THG)
VKP = (FNJ, GVR)
XQD = (CSG, KKQ)
SRM = (VHD, XNM)
SLG = (LRJ, JFL)
JCS = (CQP, CXD)
LJP = (MCQ, MCS)
NBF = (FCC, VJD)
DFL = (KDR, GFC)
NFM = (XBN, BXG)
CMR = (PKG, PKG)
JVN = (XHB, MCC)
RKC = (FSQ, MFD)
JKJ = (BSQ, LJB)
BGX = (MMD, FMS)
THG = (KQF, DFR)
RKJ = (CVN, FFK)
LQK = (CHS, FXX)
CPL = (VXL, KCF)
JSC = (TKG, NTL)
DNV = (TQN, NNH)
LFF = (HQJ, NPC)
TVQ = (SSF, GXM)
NQR = (LCQ, GRV)
TMN = (BXL, CCD)
XDM = (KXS, JLS)
CJP = (RJS, PMR)
HKV = (NMB, NXM)
SPQ = (SNC, LPF)
HQJ = (KGP, QJG)
GXG = (JMC, GVV)
KSS = (CND, PPQ)
LJG = (DTM, GXH)
BHQ = (HMC, LXT)
FGV = (KXX, LLR)
KCF = (LKJ, NTJ)
PRM = (MFX, PDJ)
QKD = (FXL, SQL)
DDB = (CSB, MCD)
VHH = (CMR, CGD)
LLM = (BVX, DXN)
PTN = (RSQ, DKQ)
GSM = (CVS, QHF)
CVN = (VHS, LDG)
RHT = (LRJ, JFL)
JFK = (JSC, MHQ)
NTS = (QFS, GQR)
TQN = (DHF, BTV)
KHG = (BGK, NQF)
ZZZ = (FXC, VQF)
VXL = (NTJ, LKJ)
VFS = (MMD, FMS)
LBQ = (PQM, DCK)
KQX = (CSB, MCD)
FDK = (XFT, PKM)
NQG = (GQR, QFS)
KXS = (LBQ, KRM)
JDN = (HDL, CCB)
TKL = (HSF, CJK)
XRG = (CQP, CXD)
BMP = (RCG, RHG)
KQF = (KGK, LGN)
HLK = (MTT, PFT)
NFK = (MRS, CNV)
HNH = (MFJ, NGM)
FKN = (SVT, LKV)
VPC = (PJC, NBF)
DDK = (SVS, QKD)
DCJ = (RPR, CVJ)
NQJ = (CMR, CMR)
LGL = (PFH, PFH)
RTD = (CDQ, LJV)
FVJ = (FJN, GHV)
BDS = (LDF, JCL)
NSG = (GGT, FRL)
RXM = (DDN, TXT)
JNJ = (SGG, HCT)
SRG = (DLX, CHL)
TGC = (FMG, FHN)
FMG = (BVF, HKK)
NTJ = (HHG, HQP)
KNJ = (HJS, GMC)
QJB = (CCP, GBD)
NXL = (SMX, GKX)
VHS = (MSX, VMV)
CRH = (BQQ, VPC)
GFF = (JFM, BSV)
GLR = (XFD, MBT)
XPR = (GXM, SSF)
LLD = (BLL, NKV)
KXQ = (FDK, RLB)
MXH = (TQQ, HXB)
RQD = (DGN, TMH)
FNB = (NVG, VJQ)
MGH = (KHD, JXB)
JGL = (BMM, KJP)
KJF = (SCV, PHF)
SXD = (BCG, HRR)
TPK = (KJV, VRG)
TJP = (FBP, CDJ)
MKH = (KXM, PRM)
HJM = (SKT, QLK)
GHP = (RFL, KBC)
LGN = (TJP, QMM)
LJV = (JLV, LLD)
NXD = (CNV, MRS)
LKH = (LLM, BNK)
CTM = (MPT, PTN)
SNC = (LQK, MMV)
PNQ = (XXH, MGB)
FMX = (BSD, QJB)
QQL = (HHH, SSN)
QLK = (FCM, MRC)
CMJ = (JGH, SFD)
FHB = (BNK, LLM)
TKG = (FQB, THH)
XPV = (DGP, NXL)
RHP = (LRX, RXF)
BRQ = (LBN, DMV)
NDL = (XMS, CVR)
LDC = (PFN, QFL)
DPP = (XNX, XNX)
NMQ = (PSS, JFJ)
SGG = (PQT, VVB)
FSR = (RPT, PVF)
AAA = (VQF, FXC)
JFL = (BJB, NFM)
XFR = (NHJ, NMH)
HHS = (SFJ, KGR)
MLZ = (RSD, GPT)
MNF = (VNG, TGQ)
FXP = (DPT, FNG)
MRS = (SDP, NQR)
MDT = (JGL, RRM)
MJJ = (GKG, XTS)
PFT = (GFD, DLG)
TVX = (BCD, NJG)
NPA = (VKP, KSN)
TDV = (LDH, VSG)
GQJ = (PDM, PDM)
NTF = (GKF, RHX)
GGT = (KQX, DDB)
LFN = (TFS, MRB)
CSM = (MJT, FHD)
NVQ = (RVG, LDK)
PKM = (FRH, BJJ)
PDM = (BRQ, XPL)
JGH = (BHC, QQL)
SSF = (CGR, BBR)
GVV = (CGH, RBG)
FSB = (PPQ, CND)
LKV = (XCL, PXV)
MXK = (SLH, PKK)
SQL = (XRX, MBV)
LRJ = (BJB, NFM)
VXH = (LFF, XQC)
HTF = (MKH, DGM)
CTB = (LGL, KCR)
HFB = (RTL, GCQ)
NTL = (FQB, THH)
SFD = (QQL, BHC)
HNP = (DPP, DPP)
TTX = (RQD, CFK)
MCQ = (HLP, DNV)
CCP = (VMR, KJG)
TFN = (MRV, SHV)
JKB = (PDM, RFZ)
TGQ = (BJV, HDX)
PHP = (JPM, NDL)
RJX = (MPC, GQP)
CVJ = (LFL, KLG)
KJP = (DDK, XSK)
QPF = (HSF, CJK)
SNQ = (XPG, LQB)
BGF = (VKN, FXP)
KLG = (TMN, JCG)
CGL = (DMK, DKC)
XCM = (XQM, LJG)
RPR = (LFL, KLG)
LFQ = (KBF, SRB)
RJS = (CHQ, GNH)
HDL = (KPR, QCK)
FXJ = (MCC, XHB)
XPG = (VKM, BNT)
DHQ = (FGV, PSV)
SQV = (QMT, FCG)
DHR = (FTQ, HPM)
FCC = (GPS, CVG)
NCH = (FCG, QMT)
QRS = (HDL, CCB)
XQM = (GXH, DTM)
SGJ = (TSH, DCJ)
KBL = (RFL, KBC)
NXC = (JBH, JNJ)
BSQ = (QJT, FVJ)
LTG = (NCH, SQV)
SMV = (JBS, MDQ)
GJJ = (MBH, NTF)
GRV = (MPF, NDP)
HPB = (RLJ, CBR)
TRS = (BXK, RSV)
GCR = (SLH, PKK)
HHH = (CRH, XTP)
GNH = (XSM, HMD)
RSQ = (QFN, GCL)
HKK = (QJX, FKK)
JBV = (TNK, TNK)
TFS = (DHG, QNF)
RTL = (FKB, XGH)
HHG = (XPT, JXQ)
PPR = (LHL, CTB)
SQP = (HGQ, MLZ)
XBN = (BFH, KSK)
CVR = (MDB, PKP)
RFL = (BHQ, TRP)
QHX = (FSR, NTN)
VCH = (MDQ, JBS)
GCL = (MPL, KDP)
KKQ = (GGJ, JHH)
GFC = (PRX, LNL)
PRD = (HTS, RNP)
GQP = (NQJ, VHH)
LJC = (VQK, KNJ)
QCT = (BCD, NJG)
KBF = (SRG, GSF)
NNH = (BTV, DHF)
SSD = (CGL, FFC)
VDD = (HKV, BCP)
VHD = (XCJ, SGJ)
RFZ = (XPL, BRQ)
KGR = (LFT, QDM)
MDQ = (NVQ, MGQ)
MXS = (LFF, XQC)
PCC = (LHL, CTB)
TLC = (RQB, JFP)
CVS = (PJP, QHX)
BNK = (DXN, BVX)
CSB = (CHH, DVM)
XPN = (VSG, LDH)
XSK = (SVS, QKD)
LBN = (LTG, SBQ)
FKK = (RQK, CDV)
MCC = (SJL, DMX)
NMH = (DSX, NNM)
MMD = (GMX, FJX)
LXS = (LJP, KBV)
XMR = (QJB, BSD)
DFR = (KGK, LGN)
DJG = (PFT, MTT)
CGH = (DGK, LFQ)
MRM = (BSQ, LJB)
XCL = (MJJ, VBK)
GBF = (JNG, MXH)
XGN = (FFK, CVN)

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advent_of_code_2023/day8/main1.rs Normal file
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use std::{fs::read_to_string, collections::HashMap};
fn parse_input() -> (String, HashMap<String, (String, String)>) {
let lines = read_to_string("input.txt").unwrap().lines().map(|line| {
String::from(line)
}).collect::<Vec<_>>();
let instr = lines[0].trim();
let mut mapping: HashMap<String, (String, String)> = HashMap::new();
for line in &lines[2..] {
let (key, instructions) = line.split_once('=').unwrap();
let (left, right) = instructions.trim().split_once(' ').unwrap();
mapping.insert(String::from(key.trim()), (String::from(&left[1..4]), String::from(&right[..3])));
}
(String::from(instr), mapping)
}
fn main() {
let (instructions, mapping) = parse_input();
let mut position = String::from("AAA");
let mut steps = 0;
let mut caret = 0;
loop {
if position == "ZZZ" {
break;
}
position = if instructions.as_bytes()[caret] == b'L' { mapping[&position].0.clone() } else {mapping[&position].1.clone() };
caret = if caret + 1 == instructions.len() { 0 } else { caret + 1 };
steps += 1;
}
println!("Number of steps taken: {}", steps);
}

86
advent_of_code_2023/day8/main2.rs Normal file
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use std::{fs::read_to_string, collections::HashMap};
struct Route {
offset: usize,
loop_length: usize,
current: usize
}
// copied from https://www.hackertouch.com/least-common-multiple-in-rust.html
fn lcm(first: usize, second: usize) -> usize {
first * second / gcd(first, second)
}
fn gcd(first: usize, second: usize) -> usize {
let mut max = first;
let mut min = second;
if min > max {
let val = max;
max = min;
min = val;
}
loop {
let res = max % min;
if res == 0 {
return min;
}
max = min;
min = res;
}
}
fn parse_input() -> (String, HashMap<String, (String, String)>) {
let lines = read_to_string("input.txt").unwrap().lines().map(|line| {
String::from(line)
}).collect::<Vec<_>>();
let instr = lines[0].trim();
let mut mapping: HashMap<String, (String, String)> = HashMap::new();
for line in &lines[2..] {
let (key, instructions) = line.split_once('=').unwrap();
let (left, right) = instructions.trim().split_once(' ').unwrap();
mapping.insert(String::from(key.trim()), (String::from(&left[1..4]), String::from(&right[..3])));
}
(String::from(instr), mapping)
}
fn find_route(start: String, instructions: &String, mapping: &HashMap<String, (String, String)>) -> usize {
let mut caret = 0;
let mut step = 0;
let mut position = start.clone();
loop {
position = if instructions.as_bytes()[caret] == b'L' { mapping[&position].0.clone() } else { mapping[&position].1.clone() };
step += 1;
caret = if caret + 1 == instructions.len() { 0 } else { caret + 1 };
if position.ends_with('Z') {
return step;
}
}
}
fn main() {
let (instructions, mapping) = parse_input();
let positions = mapping.keys().filter(|key| {
key.ends_with('A')
}).map(|string| String::from(string)).collect::<Vec<_>>();
println!("{:?}", positions);
let routes = positions.iter().map(|start| {
find_route(start.clone(), &instructions, &mapping)
}).collect::<Vec<_>>();
let mut steps = 1;
for route in routes {
steps = lcm(steps, route);
}
println!("Number of steps taken: {}", steps);
}