151b.html

<script>

// Day 3b
// =====

/**
 * Find intersection of 3 strings.
 * 
 * Loop over the strings, keep track of the current index, and create a bag of the characters. If the index is a multiple of 3, then intersect the last 3 bags and compute the score as in day3/a.
 **/

// B: Golf starts here
b=i=>i[s=`split`]`
`.reduce((y,x,k)=>y+(++k%3?0:i[s]`
`.slice(k-3,k).map(m=>m[s]``).reduce((p,q)=>p.filter(r=>q.includes(r)))[0].charCodeAt()-38)%58,0)
// Golf ends here




// Test
// ====

// B: expected value: 2760
i = 
`ZNNvFWHqLNPZHHqPTHHnTGBhrrpjvmwfMmpfpjBjwpmw
sbdzQgzgssgbglRtmjlwhjBlfrSrMt
zgsCRzJbsdRVQCDbcgLGWWLnZNGVLLZMNZnq
tvHhRtZGMvMHvfsrBBCTRbwbccRc
qznnlpzzDppWlDpQpCrcrwnBNwTZnBTZrn
PdVZJJqVZdllDPFtMjMgLjGMHvSgMF
csbhhVDDvzlVDcbccGGvfRjDHCjNLRHRCLfmnZfR
dFrStSTTmrrrHVfV
MMgQMMTMVTdgWtwTPwSgWSgGbbppJzlplvhBlPbzhlhbzG
FDJSTtSGhpPFDmFTZDpTFPmCBBrHqsCBhgBlqqrqrlRrHH
dQwMtfdzVwWfwctwnfnQCHllzRrsNzrrgNlCgqsr
fLfQnVjfwQfMdfvfnVvWDvtJPFGDpvZGbZpmbSPP
TzzCrJcDrTDdLDCJDvGNPCFqlZWlvNvWpq
RRHfjsQBFsjgjBQsWqGpNvZQqQlPPQPN
VnHBnRVssnnjsSfBwbMSrrbTwJTcwSDF
HJCgHCCFFFVGJWTlbqDdlqTDDpgl
cZccSmLrfZcrmmzSQftdpDtTHdbQTDMQ
NZZccrrBwZRPNNzmcLSSjJhGhVWCnsFnHBjGChsJ
qwwwJHTHqdFDtZBFPfFBZFzM
gVRcLnnWVgggnnnQgVWWNZtZrBfLBzZzBrMPPrZvPv
GQgQSVRtsVnNRGSCdpmwspmbmDpHmhwd
bhNgNfgwpbLMhCZMGQBmDm
FrcHrSllcqcFFMGLBDQlMDTGlT
FVSddRSJRjLwbjJPJw
wzhhrTwwTrSsdHQjjSHnBjQj
gRDCmVgRgMvtMfVMRBBBhWCHQQHGJHZJQZ
NtgVgttVbMNmvsNlpcrLhLTNPw
MCgjsfnscgjjgnGgJHHqHDgdHbGr
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GfVmfnmJVnNVFhnhGmbmhpHvqjrzHZBjfvrtBHHZrwBt
ddWQldlMdWMlQsLWTLQgMNwBrvjrZjNrwzZjswHqrv
QQdTRcgTRPDlMQlQPQdhcNNnbJmbGpVnGchFmm
CjjZCCZfvWZRHHhRtwhvPN
mrnqlqMqBlSSLnBTLBwmHPPWhPPHtFRPWzwt
rBVTrrMMSMLQBrndGcddWQbbdZfCZJ
LFtdjHjLjLqHqstLTjFLFqNMnMhhZdDDNMVbWdDDbhnZ
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bZwZjNNZGLSrVsGndPPV
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TmHTqlVHwVpQqjmwGvSgSpnLpzfWGWSn
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fjpQvNZcGhGGTtQS
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VDvmqllmJfjWlnplNs
ZmdHZJjvQLdRjpmLJrqqZBhhtCschPfBPcrDfPffCD
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FqgFGtbgTvRwrLqhvw
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PLlZDLZDsFCvbDQv
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ppczpzpffGwfBNLGmn
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rmmLpLLfzrlmslMBHvdRddNDDJDrqD
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DpgfvnvMfCsqlMtSll
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cwNJmPzQwNzczzNsJGhhHfhrfvVHGvtvVVfC
jjtbtDswcmPWlbgRnRdMZL
TmpTBBwvspTptRmsmTGLQDGRHGgVGLSQSMHQ
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LLhZmGVLhVlTZfWWfWpCrDsGSp
VLVTnqjjZngtQRFjvzDM
gmRBpjrpRvCfRCrBgvjHShnbnngbgSJnNsHMHS
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chtwTmCNlRRZzRPT
hmcCssCswrMDGMSrsr
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tbrrHsgsVmmmbtgwVsQRqjJMmqMjQfJfLFLD
ZvlBGzdvjGfRFJQJ
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lzJlGBSPPhzjgZsTCr
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FFVHRwVLvFvVrVHrZcLmRHggjDmdDnDnznnznzQjzdmJddbn
WrvgRgcRcRrrcRvgcVrHVrwCCSfsCsGsllhMSSSSMttlSCpG
hBPJqVZTqqPSlGlfddfddZvl
JWWMJCpnMrmztzdjnzld
RbWsrwMrpbRspbWgpwhLJPccNVqLLPSVgVPV
hcTrWqcfhwGfWrWMjHjGvDHPmJMDzF
ZtlsnZZtLBSbSssnbndjDJJFHFHJPHPsHMTHHM
ntRZtSbtZgZStTqchwQfRwNpcq
GfLqrsqQGgPgjjQGVcNvTpTpNFcWPvPPpT
bRnRLnMZFdCMcpvT
RnRhzRlmlhhHhhmhRsqLrfzrGVSrGBSGrL
fbMffwdZsncrGcfG
qDBjSSLqhLBSmDbjqNhqTLjCGrCHGrvcGWcpWcrGWnCrpm
STLDqbhTLqNTNSRhlwZlJlRQFFRwMdPQ
TVVGNFggcjPPJzwvQlRRwRvSlcSc
frsBbWhtSRzSLfRf
qDCqddbsWrqzhsdNmdJNJHjTggFFVV
NTWTDrSdFTLtPTGf
lZqjHlVRvRltLtRWFMtFLL
qvjWzzvVbZpjqllggscdchwDrCphwsdhrD`

console.log(b(i));

</script>