Created
December 19, 2015 12:53
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import java.util.ArrayList; | |
import java.util.List; | |
public class Day19 { | |
public static String replace(String where, String what, String with, int pos) { | |
return where.substring(0, pos) + with + where.substring(pos + what.length()); | |
} | |
public static void main(String[] args) { | |
List<String[]> transforms = FileIO.getFileLinesSplit(".\\InputDay19.txt", " => "); | |
String medicine = "ORnPBPMgArCaCaCaSiThCaCaSiThCaCaPBSiRnFArRnFArCaCaSiThCaCaSiThCaCaCaCaCaCaSiRnFYFArSiRnMgArCaSiRnPTiTiBFYPBFArSiRnCaSiRnTiRnFArSiAlArPTiBPTiRnCaSiAlArCaPTiTiBPMgYFArPTiRnFArSiRnCaCaFArRnCaFArCaSiRnSiRnMgArFYCaSiRnMgArCaCaSiThPRnFArPBCaSiRnMgArCaCaSiThCaSiRnTiMgArFArSiThSiThCaCaSiRnMgArCaCaSiRnFArTiBPTiRnCaSiAlArCaPTiRnFArPBPBCaCaSiThCaPBSiThPRnFArSiThCaSiThCaSiThCaPTiBSiRnFYFArCaCaPRnFArPBCaCaPBSiRnTiRnFArCaPRnFArSiRnCaCaCaSiThCaRnCaFArYCaSiRnFArBCaCaCaSiThFArPBFArCaSiRnFArRnCaCaCaFArSiRnFArTiRnPMgArF"; | |
// part 1 | |
List<String> molecules = new ArrayList<>(); | |
for(String[] trans : transforms) { | |
int pos = 0; | |
while((pos = medicine.indexOf(trans[0], pos)) >= 0) { | |
molecules.add(replace(medicine,trans[0],trans[1],pos)); | |
pos += trans[0].length(); | |
} | |
} | |
long count = molecules.stream() | |
.distinct() | |
.count(); | |
System.out.println("Part 1: Total unique molecules = " + count); | |
// part 2 | |
int count2 = 0; | |
while (!medicine.equals("e")) { | |
for(String[] trans : transforms) { | |
if(medicine.contains(trans[1])) { | |
medicine = replace(medicine, trans[1], trans[0], medicine.indexOf(trans[1])); | |
System.out.println(medicine); | |
count2++; | |
} | |
} | |
} | |
System.out.println("Part 2: Total unique molecules = " + count2); | |
} | |
} |
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Al => ThF | |
Al => ThRnFAr | |
B => BCa | |
B => TiB | |
B => TiRnFAr | |
Ca => CaCa | |
Ca => PB | |
Ca => PRnFAr | |
Ca => SiRnFYFAr | |
Ca => SiRnMgAr | |
Ca => SiTh | |
F => CaF | |
F => PMg | |
F => SiAl | |
H => CRnAlAr | |
H => CRnFYFYFAr | |
H => CRnFYMgAr | |
H => CRnMgYFAr | |
H => HCa | |
H => NRnFYFAr | |
H => NRnMgAr | |
H => NTh | |
H => OB | |
H => ORnFAr | |
Mg => BF | |
Mg => TiMg | |
N => CRnFAr | |
N => HSi | |
O => CRnFYFAr | |
O => CRnMgAr | |
O => HP | |
O => NRnFAr | |
O => OTi | |
P => CaP | |
P => PTi | |
P => SiRnFAr | |
Si => CaSi | |
Th => ThCa | |
Ti => BP | |
Ti => TiTi | |
e => HF | |
e => NAl | |
e => OMg |
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