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Improve solutions for 2024 day 2 and 3

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SebastianStork 2024-12-11 23:16:12 +01:00
parent 55e7f3c862
commit 1526a11a09
2 changed files with 37 additions and 20 deletions
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50
2024/day-03/main.cpp
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@ -23,8 +23,10 @@ bool isNumber(const string &potentialNumber)
return true;
}
string getNextValidInstruction(string &line, const bool considerConditionals, bool &doMultiplication)
string getNextValidInstruction(string &line, bool *doMultiplication = nullptr)
{
const bool considerConditionals = doMultiplication;
while (true) {
{
size_t mulPosition = line.find("mul(");
@ -35,17 +37,14 @@ string getNextValidInstruction(string &line, const bool considerConditionals, bo
if (considerConditionals) {
size_t doPosition = line.find("do()");
size_t dontPosition = line.find("don't()");
if ((doPosition < mulPosition) && (dontPosition < mulPosition)) {
if (doPosition > dontPosition) {
doMultiplication = true;
} else {
doMultiplication = false;
}
*doMultiplication = doPosition > dontPosition;
} else {
if (doPosition < mulPosition) {
doMultiplication = true;
*doMultiplication = true;
} else if (dontPosition < mulPosition) {
doMultiplication = false;
*doMultiplication = false;
}
}
}
@ -53,7 +52,7 @@ string getNextValidInstruction(string &line, const bool considerConditionals, bo
line.erase(0, mulPosition);
}
if (considerConditionals && !doMultiplication) {
if (considerConditionals && !*doMultiplication) {
line.erase(0, 4);
continue;
}
@ -98,19 +97,36 @@ int getInstructionResult(const string &instruction)
return number1 * number2;
}
int getResult(vector<string> lines, const bool considerConditionals)
int calculateSumIgnoringConditionals(vector<string> lines)
{
int result = 0;
for (string &line : lines) {
while (true) {
string instruction = getNextValidInstruction(line);
if (instruction.empty()) {
break;
}
result += getInstructionResult(instruction);
}
}
return result;
}
int calculateSumConsideringConditionals(vector<string> lines)
{
int result = 0;
bool doMultiplication = true;
for (string &line : lines) {
while (true) {
string instruction = getNextValidInstruction(line,
considerConditionals,
doMultiplication);
if (instruction == "") {
string instruction = getNextValidInstruction(line, &doMultiplication);
if (instruction.empty()) {
break;
}
result += getInstructionResult(instruction);
}
}
@ -123,9 +139,9 @@ int main()
vector<string> lines = readInput();
// Part one
cout << "Sum of all the multiplication: " << getResult(lines, false) << endl;
cout << "Sum of all the multiplications: " << calculateSumIgnoringConditionals(lines) << endl;
// Part two
cout << "Sum of all the multiplication (when taking the conditional statements into account): "
<< getResult(lines, true) << endl;
cout << "Sum of all the multiplications (when taking the conditional statements into account): "
<< calculateSumConsideringConditionals(lines) << endl;
}