bruteforce forever

day6/second.cpp

@@ -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 posX;
-  int posY_orig;
+  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;
+        posX = i;
-        posY_orig = j;
+        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;
-      }
+      } else {
-
+        if (WillHeGetStuck(posX, posY, direction, i, j, map)) {
-      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) {
           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;
 }