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05.cpp
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05.cpp
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#include <chrono>
#include <iostream>
#include <vector>
using std::vector;
int solve_pt1(vector<int> jumps) {
int steps = 0;
unsigned int ji = 0;
while (ji < jumps.size()) {
int j = jumps[ji];
jumps[ji] += 1;
ji = ji + static_cast<unsigned int>(j);
steps += 1;
}
return steps;
}
int solve_pt2(vector<int> jumps) {
int steps = 0;
unsigned int ji = 0;
while (ji < jumps.size()) {
int j = jumps[ji];
jumps[ji] = j >= 3 ? j - 1 : j + 1;
ji = ji + static_cast<unsigned int>(j);
steps += 1;
}
return steps;
}
int main() {
auto tstart = std::chrono::high_resolution_clock::now();
int pt1 = 0;
int pt2 = 0;
std::string input;
std::vector<int> jumps;
while (std::getline(std::cin, input)) {
jumps.push_back(std::stoi(input));
}
pt1 = solve_pt1(jumps);
pt2 = solve_pt2(jumps);
std::cout << "--- Day 5: A Maze of Twisty Trampolines, All Alike ---\n";
std::cout << "Part 1: " << pt1 << "\n";
std::cout << "Part 2: " << pt2 << "\n";
auto tstop = std::chrono::high_resolution_clock::now();
auto duration =
std::chrono::duration_cast<std::chrono::microseconds>(tstop - tstart);
std::cout << "Time: " << (static_cast<double>(duration.count()) / 1000.0)
<< " ms"
<< "\n";
return EXIT_SUCCESS;
}