PoliEcho/advent-of-code-2024
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bruteforce forever

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PoliEcho 2024-12-14 21:30:37 +01:00
parent 6d94a27d97
commit f654c7452c
1 changed files with 64 additions and 91 deletions
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155
day6/second.cpp
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@ -1,5 +1,6 @@
#include <fstream>
#include <iostream>
#include <ostream>
#include <vector>
bool AreWeInBounds(int x, int y, std::vector<std::vector<char>> &map) {
@ -23,8 +24,64 @@ int conditional_operation(int a, int b, char op) {
}
}
bool WillHeGetStuck(int posX, int posY, int direction, int locX, int locY,
std::vector<std::vector<char>> map) {
char op_x;
char op_y;
map[locX][locY] = '#';
int conter = 0;
while (true) {
map[posX][posY] = 'X';
conter++;
if (conter > 10000) {
return true;
}
switch (direction) {
case 0:
op_x = '-';
op_y = 'n';
break;
case 1:
op_x = 'n';
op_y = '+';
break;
case 2:
op_x = '+';
op_y = 'n';
break;
case 3:
op_x = 'n';
op_y = '-';
break;
default:
std::cerr << "How did we get here?" << std::endl;
exit(255);
break;
}
if (!AreWeInBounds(conditional_operation(posX, 1, op_x),
conditional_operation(posY, 1, op_y), map)) {
break;
}
switch (map[conditional_operation(posX, 1, op_x)]
[conditional_operation(posY, 1, op_y)]) {
case '#':
direction++;
if (direction > 3) {
direction = 0;
}
break;
default:
posX = conditional_operation(posX, 1, op_x);
posY = conditional_operation(posY, 1, op_y);
}
}
return false;
}
int main() {
std::ifstream inputfile("example");
std::ifstream inputfile("input");
std::string input;
int res = 0;
@ -38,8 +95,8 @@ int main() {
while (std::getline(inputfile, line)) {
map.push_back(std::vector<char>(line.begin(), line.end()));
}
int posX_orig;
int posY_orig;
int posX;
int posY;
int direction;
/*
0: up
@ -51,108 +108,24 @@ int main() {
for (int i = 0; i < map.size(); i++) {
for (int j = 0; j < map[i].size(); j++) {
if (map[i][j] == '^') {
posX_orig = i;
posY_orig = j;
posX = i;
posY = j;
direction = 0;
}
}
}
char op_x;
char op_y;
std::vector<std::vector<char>> mapTmp;
std::vector<std::vector<char>> mapRes = map;
int posX;
int posY;
int counter;
for (int i = 0; i < map.size(); i++) {
for (int j = 0; j < map[i].size(); j++) {
if (map[i][j] == '^' || map[i][j] == '#') {
continue;
}
mapTmp.clear();
mapTmp = map;
mapTmp[i][j] = 'O';
posX = posX_orig;
posY = posY_orig;
counter = 0;
std::cout << "checking: " << i << " " << j << std::endl;
for (int i = 0; i < mapTmp.size(); i++) {
for (int j = 0; j < mapTmp[i].size(); j++) {
std::cout << mapTmp[i][j];
}
std::cout << "\n\n";
}
while (true) {
if (mapTmp[posX][posY] == 'X') {
counter++;
} else {
mapTmp[posX][posY] = 'X';
counter = 0;
}
if (counter > 200) {
} else {
if (WillHeGetStuck(posX, posY, direction, i, j, map)) {
res++;
mapRes[i][j] = 'O';
break;
}
switch (direction) {
case 0:
op_x = '-';
op_y = 'n';
break;
case 1:
op_x = 'n';
op_y = '+';
break;
case 2:
op_x = '+';
op_y = 'n';
break;
case 3:
op_x = 'n';
op_y = '-';
break;
default:
std::cerr << "How did we get here?" << std::endl;
exit(255);
break;
}
if (!AreWeInBounds(conditional_operation(posX, 1, op_x),
conditional_operation(posY, 1, op_y), mapTmp)) {
break;
}
switch (mapTmp[conditional_operation(posX, 1, op_x)]
[conditional_operation(posY, 1, op_y)]) {
case '#':
direction++;
if (direction > 3) {
direction = 0;
}
break;
case 'O':
direction++;
if (direction > 3) {
direction = 0;
}
break;
default:
posX = conditional_operation(posX, 1, op_x);
posY = conditional_operation(posY, 1, op_y);
}
}
}
}
for (int i = 0; i < mapRes.size(); i++) {
for (int j = 0; j < mapRes[i].size(); j++) {
std::cout << mapRes[i][j];
}
std::cout << std::endl;
}
std::cout << "\nRes: " << res << std::endl;
}