109 lines
2.1 KiB
C++
109 lines
2.1 KiB
C++
#include "../include/useful_funcs.h"
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#include <fstream>
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#include <iostream>
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#include <ostream>
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#include <vector>
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bool WillHeGetStuck(int posX, int posY, int direction, int locX, int locY,
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std::vector<std::vector<char>> map) {
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char op_x;
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char op_y;
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map[locX][locY] = '#';
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int conter = 0;
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while (true) {
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map[posX][posY] = 'X';
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conter++;
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if (conter > 10000) {
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return true;
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}
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switch (direction) {
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case 0:
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op_x = '-';
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op_y = 'n';
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break;
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case 1:
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op_x = 'n';
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op_y = '+';
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break;
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case 2:
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op_x = '+';
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op_y = 'n';
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break;
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case 3:
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op_x = 'n';
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op_y = '-';
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break;
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default:
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std::cerr << "How did we get here?" << std::endl;
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exit(255);
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break;
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}
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if (!AreWeInBounds(condop(posX, 1, op_x), condop(posY, 1, op_y), map)) {
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break;
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}
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switch (map[condop(posX, 1, op_x)][condop(posY, 1, op_y)]) {
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case '#':
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direction++;
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if (direction > 3) {
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direction = 0;
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}
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break;
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default:
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posX = condop(posX, 1, op_x);
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posY = condop(posY, 1, op_y);
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}
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}
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return false;
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}
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int main() {
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std::ifstream inputfile("input");
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std::string input;
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int res = 0;
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if (!inputfile.is_open()) {
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std::cerr << "Could not open the file" << std::endl;
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return ENOENT;
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}
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std::string line;
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std::vector<std::vector<char>> map;
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while (std::getline(inputfile, line)) {
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map.push_back(std::vector<char>(line.begin(), line.end()));
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}
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int posX;
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int posY;
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int direction;
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/*
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0: up
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1: right
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2: down
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3: left
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*/
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for (int i = 0; i < map.size(); i++) {
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for (int j = 0; j < map[i].size(); j++) {
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if (map[i][j] == '^') {
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posX = i;
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posY = j;
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direction = 0;
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}
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}
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}
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for (int i = 0; i < map.size(); i++) {
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for (int j = 0; j < map[i].size(); j++) {
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if (map[i][j] == '^' || map[i][j] == '#') {
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continue;
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} else {
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if (WillHeGetStuck(posX, posY, direction, i, j, map)) {
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res++;
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}
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}
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}
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}
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std::cout << "\nRes: " << res << std::endl;
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} |