advent_of_code/2022/06/main.cpp
2022-12-06 06:52:48 +01:00

49 lines
1.4 KiB
C++

#include <fstream>
#include <iostream>
#include <sstream>
#include <vector>
std::string getSignal( std::ifstream &file ) {
std::string str;
std::getline( file, str );
return str;
}
uint64_t findDifferentCharGroup(const std::string &signal, size_t group_size) {
std::deque<char> different;
int chars = 0;
for(size_t i = 0; i < signal.size(); i++) {
chars++;
for(size_t j = 0; j < different.size(); j++) {
if(different[j] == signal[i]) {
for(size_t k = 0; k <= j; k++) {
different.pop_front();
}
break;
}
}
different.push_back(signal[i]);
if(different.size() == group_size) {
break;
}
}
return chars;
}
uint64_t part1(const std::string &signal) {
return findDifferentCharGroup(signal, 4);
}
uint64_t part2(const std::string &signal) {
return findDifferentCharGroup(signal, 14);
}
int main() {
std::ifstream input_file( "input" );
auto signal = getSignal( input_file );
std::cout << "First packet marker appears after \033[91;1m" << findDifferentCharGroup(signal, 4)
<< "\033[0m characters." << std::endl;
std::cout << "First message marker appears after \033[91;1m" << findDifferentCharGroup(signal, 14)
<< "\033[0m characters." << std::endl;
}