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