diff --git a/day03/input.ivy b/day03/input.ivy
new file mode 100644
index 0000000..4cfbc36
--- /dev/null
+++ b/day03/input.ivy
@@ -0,0 +1 @@
+input = "WjmsdnddnmQPZPPJPL\nbQllTtpBlgwtrbbCwfZcfSFPSfLCSF\nGgVgQrlpphBGrlVGgTtsRHRWVRMzRdVsqdnDnV\nMMTcbpnfNGQbMjgsRwSzRptRzz\nlPqCCqQdQqQmCPRzRVSwtzgqqwqR\nlrDdllPdBWdDFQFnMbDNDn\nFldWTldlpBSLzvpnpSTpWbDhbHNDPHhJcNHNDwbH\nqVCGQRGrrgMQrJhPNchgvgJhNc\nfrjGfMrGQMjsRrRQjvQGmrQQszTTpSLBznlzBlLLSBLLSZTn\nTPZZZMTTbNTZNtTlTbjPVRVGzpGQLLzdGgmslhzSzgLzQh\nwrfwDDvcnFvCfrrSQsmzGGQQdndsGg\nqfHwHCqCqCrFJrcBHCCJRmWTRTmVMttjRjRHZMNV\nvpbqnzbPmWLFjFLBnjZg\nNltQcCClQlcGQGtMTCRdGTGBFZRLZjFFZZhBPLrFHZFjHf\nlMtlGMwMsCCNlTwtsCPzzmPmmVpmpWqVWsWz\nVmWVSchSrScGtwlVtBnwBVFF\nRZZPRNpPCLZvZPZNCLbQPZNBFtttmwBMTMTtttCwtgwBgl\nRNNmPvbQQjPRQQNNHpNbhsfzWJqqSJcsGHhHcfhq\ndtJvcpccWvLDztRCRRCrCC\nqHVslPzPqHqzmPhTzmDFggjrHrSCNFFFSjgR\nqPVPMhszZPVhwBZcdpvZJncbcJ\nHBNLlBDtvLDHhHLvfwlFjqfQTFqqWfST\nddsGcggJncZVRdGCdZdcWWzSFrjzQFrfTzqfCjFw\nVdgscZmbZNBvbDHTbL\nGtSZQqpHpHfGHzzqHzHfSbPbnJCrRCnJChmjnJnbSh\nDvcTNTDWlNDWdlbnnbjmRhRrCCRd\ncclNlwBRvvTNccRlBNRspVLLZzVzVZQqfqqLpzpw\ndBSfHdZvMQMdNVpWRmWmLCmmtB\nrbTTrrjDcqcrrqrjjJGGclltPCWDmvtpmpPpvRDsCspsLC\nvlhjThlqcjrnTvThndddHZngMnfwNQFNFM\ntHqfszrgLsvgqtHrHtwVCGBRRjGSCwsCsmmV\nMdFMclPmcDQFDlDdlZPmbVpCbFpCbBSCCRGCFpbV\nmcDJdDQMcDTZQhhNNPldhhDtvHLgqtzgLvzTzWHWnWfvvz\nsVdGlTMMVTGCdsTMHHWWnNBzNWpNWCpW\nmPmjFhlwmwmWrpSrSWHB\njhPhjwgthtFFjRwjZgjGdJcdflfqMsZLLsdZdc\nCBRsTsBBzLCfLqtqBRPNDQglSttlcgDlgGGt\nrJdbrJjrdbVJZdVZCGrNNcgDQlcQrggl\nFpFbbppjFCdwmTvsvfzmTnTBfq\ncqhcWqqCNjGWqcqhGGZzngftmptLZLGZTn\nbrJHBbPVHPvSsdHrzQLzZgpfVzpfQtnL\ndHFPBPrBJFRzcWNFhWwN\nQTBTfQTZsjWDJBJd\nFgFWNqWGDPqlPllp\nCCvHzSWFrrtvNvNNHLGQQfbVRRfHZcZcVTTTnZ\nZCCHHCVRZzBZQThM\nnljDtcqnhcfbwjwltfLQMLLQQppJBMLQJL\nqDsqschsqblDqjcqtRmNVVdNsddNNPmFgV\nQQRnqGBSpQnMmSGmRQQFtdcbbtHHccjpTFcTfF\nwCNPNwNNWNgZHJHJFffqCjbj\nZNPzNWgNrsmzMVqsqs\npVWlMBWjlWWqspWDjdjMpMDCPtmmdbhtQtQtbGPCzChchz\nHZNgrHSvHwnFZnvgNvnwLPBGQHmCmtPmtBCGGCmQhG\nFrNfvSNSZLZJrJsVlRWWWqRBVTff\nPQctSHQDPSQcbShpFzbmFddpmdmR\nwqWVwvwNCJRhmdhwJw\nnMnWggVqRVZqHBSBsQsQGDSZ\nqppwrgZSLsVbbfvZ\nhhBHPQQChCDcPcsvvhbGbsllJTfv\nMDWmWFCPFWtgpRWjws\nbmRjdmrJRjhJdJLZBjTFfHGTtQFTSQBS\nwCNVnsspwsnvNDwnsDwSBHtDHHQGTFQFtMrQMS\nnWsNvqVgVcqdJrchrz\nMZlfqlmblmMRWhWNsjSQfh\nCznczgtDFnVtFBNSRNttvhQsNh\nSGDFzVrzVPrGHVnzCPVnlZlPwTbpTqlbqLMpbLlq\nlbbbGDlwLDLjvDvm\nFQfQnLTWVcPChtjmjWSj\ncfgzzgfgfVdzTdfNwBpbLbwdRbpZGrdw\nmwnWtbmdWdccwtgTmwnQfPqsqLQQJQQLsfQQ\nSjrZbhvBZzPHQqfGJfjG\nFlrMBSvMZZFBZhShMMdctWDtmFNDbDTmtmpt\nndHWprpqFTnnpdNFlhljzlGTwDGzlhGz\nfvZmmVVfJctMZsgMgmcBmsZhwQlGDCzPPZWDGDjCllhC\nWsmvmsmRNnpRHdbS\nLgZSvhvcsWtcWnjrFrWjjjnPWW\nDJDfNlDNRFlpMlFLFP\nTmqTqDHdmfwJRwfdQJLHzzSggHZZcGzhtZvcZhzG\nlbTpqhhgSlgtlTqSDzzLPPPrLGTTGnLm\nVwGfQGBGZWNnmDLPznLB\nvQdfZFWvFMMFwWGGhpGqJbpFtgbS\nhSvCvFRDwmzCCHrszb\njdMgfTblgjJTLLLzqqGscmPmlqPzHc\nbjQLTTbZMfJffZBBWdjBBQwVDntFpRvvDVvSnhppFv\nFFnFQndPqzmjHscmJFwc\nZrZrRgDphGGDZgRRBSBNMHHvmwJJSNJHcv\nDGrbbthfWWWDgtfffttfpGPVqnmblqPqCdQTlTPCzTll\nsHTsGrHpsftmddRRZfRv\nMqFcqcMQbMcVPCdFZCzZsRsFzL\nqnVlBbcJJbbMcbgQJMMbQlDWWwHWSWwpTsGHGrpDWG\nqpmvVVcGvVVcVmDsCfqTHLLJzTjfZzLZ\nrSSgwwnSRRBrQrZzZHCQrZ\nBFgFRgdNnSBbbnhSMBSNFdsWVtpWmzsGtvpVPvGWVDDN\nfBBRfJBzzMRGRzCBgWtbCWtbgHHHWdqt\nmvNcDcsDLLnnqfbv\nhpTsTsTrDrfpMSFFZjPFMrSP\nCNQGGDMFWGnWWvvNMQFPvrgzBLVBLszwgggLgw\nmppZVZtZRTbTTpRccVbgrSLzSPSzBrfbPBbSPw\nVtZJhRJcTpJTHlhtHZCFFWFjNjGGnFhCqDqG\ncppcZGcGgGpdTgSSnmpFMFrFzmwqwmrHwz\nRStQJNCNvfBQNjrqmrjFrBMzFB\nLJDNNJCDLcdLnSVd\ngNrBNSrNNtSjBndzmzlVnm\nMbfqfpCLpCsLqsLFSbQLfnMdcdRRcdzldlnljzncnJ\nQPQLqZqhSqhvtvTTWrNg\nDtrrcGvtLnrrvLrfctfHztrfQpbwwphpdSbbPPPwFSFFRPwH\ngggBqTNdTNjqWBlNmCqCmNggQPhpPPPbhhQpSBpJwbSJSQFR\nZglTmgWNgVZMZdsGMcvDcMdMnz\nbjtTFsPmmtpvVlQHlQJQnJjn\nWzDzwLCSLrrDNLdrSZRCwNzrlQlJMnJQJJVhbcMhgllwnJQh\nfRCZzrWRzzGbGvTmBPTf\nlVlfJVblPQbllflfLdJdvGpjnFRFqJFnDqpJjnpF\nHcwZMgmwWCHHCSwcWCcgSCtCqqpFppGDqvDnRhgnnqFDpjFT\ncwCHtGrCssWHCCWZZMbPPNBVbNfVbPllVszf\nDSpSnRwrZDPWsJdZ\nzjjlQVjlNZmCVCfhCfgFFfFFFqWJbgbFWHJH\nlNQMlGjQBZjCmhNMCChGzlVNrpTnccLLwcRwTSppSpprLRcB\nvLfvcgglbfLfgqdgNpPtzqDmPzmJTTztPCHT\nZWSQVGwQcWjSshGwVcnSzDJZtPPTzmzzJHCTzDtJ\nSjVSrWVhQVQhwrLMcrFbfplcflvv\nNgtfSRPnnRrSlgsPhnShDWQlMWpVBMMMpCWVBpCQBB\nLLJnvwJvZHZbHTbVCQBppCFJCWWQBz\nwHTGZmZvdvLvjLwZdqngNgsGtrDPSDhtNfDf\nDwrDRlrwmbSbRgwsSbRwGJvQGqjJqGNTJTNGTSGn\nPZdMZzCQFBZWWFQvJZvcNcjqNjjZJG\nWHWCFHBBdzzMWhPFtFdMzlRsVbVmDrRVVrtQplwVwD\nbpWbJMWpJbprfNMrBfJfprWhPnGtnHnLHjPPjLvsWnHGvGvj\nqZdgVVgDQhQZlwcqgDcchldjjmLtntmntPQsmLnLPjssnL\nRVRlgcSSdglZczdqbTCrhBrBpNBSBSbF\nSgbGvfbnGgmnNnnzqMqqHHRzbZBzZR\nTWlssdFwWdtswWPtTtWltwdVHlZZzRHZBZRzrprqHMpqgZrq\ndssdCWTFwSvgmDjDCG\npqsDnNzzZsdZSnDSpwjBCBWvgjvWjNFWQgWC\nlVGtRtLMGGfbTGTtTbQCQnBQBnBFgFQcgjfc\nGPbTbPtnPttmLTGRRbtmdwSDwpwwhZqmdpzDhDJd\nMdccRQMJvHdgZggvhjjMgHcHlWWqFFWmGqFbJWzzFLWlLmPm\nTDpSsTrtblSzQlGQ\ntfVNrwTwtswTssMRjMMQQddNMRCd\nGqGqGpFqqgDGFRqDwwqqmzpGTLPvVWMPVCPLJLRJJMLTlCWV\nrHrSbrsbQcbtdNHHHfdPlvWBLLWlvMTVlVLCJf\nrccbtthHSHsNHrrcttwqpnDFnMmpnzFnFhnF\nvQQQbRvlLjNNLLBzNllNHNBqGqhMWhGGhTqmPmqhWTFhRm\ntnsZwgSnCDrZSCDsfTMSGpPWmPSWmGmbFq\nCrVnfnCCtrCgfrffcrstDnJNlvJdNvzdBcHdLBJHvbBv\nnmQsMqTnLlmmpQZmTZcdHwCFSpHJSSWHSJVSWSHH\nvRgRRtfPvDjzDgDbsjzRvjfNNWWCSJFwrHCFbrCJWJHCSC\nGhsRBztDB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DLZlTLLZQrJ\nnhbnbfjcnfMfFNVtBq\nQHmPNZvfCLsSwJSm\npDhjpVDFcRBpFFjjMnRcVhpFCzbzsZbSSCtwtLMSLZLLtLbs\nFRjrnRchnfHPrrZlHl\nbjjMbdChgRDZthpQpRQnwRTprRwS\nmGzJsGsHzHGPvvvqvzGzSnglSJrrwQgnlQQSrlQl\nqvzHqHLHmHgPsNBdCdZtVBtVVMBFbh\nCctrCwrdpTwcpVrdpTpcrcnSJQttvQPHJQNQnQNjvvHQ\nzsqRlslRLqfgRmWsRgRzqzQnHjSBSQWJHPhHnSvHnJJJ\nGRgllbgfRgbzfRmwwcGdFMcTVPrFCF"
diff --git a/day03/sol.ivy b/day03/sol.ivy
new file mode 100644
index 0000000..780b84c
--- /dev/null
+++ b/day03/sol.ivy
@@ -0,0 +1,48 @@
+) get "input.ivy"
+
+alpha = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ" 
+op vec str = or/ alpha o.== str
+
+# find the first occurence of an element in a vector
+op c index str = +/ and\ c != str
+
+# reshapes a vector as a 1-row matrix
+op lift v = (1, rho v) rho v
+
+op a concat b =
+    0 == rho rho a: b
+    0 == rho rho b: a
+    a, b
+
+nl = "\n"
+null = 0 rho 0
+
+op m parse input =
+    (rho input) == 0: m         # if input is empty return the matrix
+    i = nl index input          # find the first newline
+    k = (i+1) min (rho input)
+    line = i take input         # get chars before the newline
+    rest = k drop input         # get chars after the newline
+    n = (rho line) / 2          # split line into two equal pieces
+    A = vec n take line         # and convert them to 1-hot vectors
+    B = vec n drop line
+    C = (lift A), (lift B)      # make a pair
+    m = m concat lift C         # add the pair to the accumulator matrix
+    m parse rest                # recurse
+
+op parse input = null parse input
+
+op score m = +/ (iota rho alpha) * +/ transp m
+
+op solve m = 
+    score m[;1] and m[;2]
+
+op solve2 m =
+    m = m[;1] or m[;2]
+    n = (rho m)[1] / 3
+    i = -2 + 3 * iota n
+    score m[i] and m[i+1] and m[i+2]
+
+m = parse input
+solve m
+solve2 m