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Using the filestream to run the parser loop directly 

Also removed col2 variable and calculating occurrence_map during parsing.
This commit is contained in:
Stedd 2024-12-01 17:28:18 +01:00
parent 89318eaf4c
commit 3d44c7c416
1 changed files with 4 additions and 12 deletions
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16
days/day01.cpp
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@ -153,7 +153,6 @@ Once again consider your left and right lists. What is their similarity score?
void day01::Part2() void day01::Part2()
{ {
std::vector<int> col1; std::vector<int> col1;
std::vector<int> col2;
std::unordered_map<int, int> occurrence_map; std::unordered_map<int, int> occurrence_map;
int sum = 0; int sum = 0;
@ -168,21 +167,14 @@ void day01::Part2()
return; return;
} }
std::string delimiter = " ";
auto delimiterLength = delimiter.length();
std::string line; std::string line;
while (std::getline(input, line)) int num1, num2;
while (input >> num1 >> num2)
{ {
auto delimiterPos = line.find(delimiter); col1.emplace_back(num1);
col1.emplace_back(std::stoi(line.substr(0, delimiterPos))); occurrence_map[num2]++;
col2.emplace_back(std::stoi(line.substr(delimiterPos + delimiterLength, line.length())));
} }
for (auto number: col2)
{
occurrence_map[number]++;
}
for (auto number: col1) for (auto number: col1)
{ {
sum += number * occurrence_map[number]; sum += number * occurrence_map[number];