WTF

day9/day.cpp

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+#include "../include/color.h"
+#include "../include/useful_funcs.h"
+#include <cstdlib>
+#include <fstream>
+#include <iostream>
+#include <vector>
+
+void printDiskMap(std::vector<char> &diskmap) {
+  std::string numC = BOLDGREEN;
+  for (int i = 0; i < diskmap.size(); i++) {
+    if (diskmap[i] == '.') {
+      numC = BOLDYELLOW;
+      std::clog << RED "." << RESET;
+    } else {
+      std::clog << numC << diskmap[i] << RESET;
+    }
+  }
+  std::cout << RESET << std::endl;
+}
+int main() {
+  std::ifstream inputfile("input");
+
+  unsigned long long res = 0;
+  if (!inputfile.is_open()) {
+    std::cerr << "Could not open the file" << std::endl;
+    return ENOENT;
+  }
+
+  std::vector<char> diskmap;
+
+  // create the disk map
+  {
+    std::string line;
+    inputfile >> line;
+    int id = 0;
+    std::vector<char> lineSplited = std::vector<char>(line.begin(), line.end());
+    for (int i = 0; i < lineSplited.size(); i++) {
+
+      for (int j = 0; j < lineSplited[i] - '0'; j++) {
+        if (i % 2 == 0) {
+          diskmap.push_back(id + '0');
+        } else {
+          diskmap.push_back('.');
+        }
+      }
+      if (i % 2 == 0) {
+        id++;
+      }
+    }
+  }
+  printDiskMap(diskmap);
+  {
+    int firstDot;
+    while (std::find(diskmap.begin(), diskmap.end(), '.') != diskmap.end()) {
+      firstDot =
+          std::find(diskmap.begin(), diskmap.end(), '.') - diskmap.begin();
+      diskmap[firstDot] = diskmap.back();
+      diskmap.pop_back();
+      printDiskMap(diskmap);
+    }
+  }
+  std::vector<int> diskmapInt;
+
+  std::transform(diskmap.begin(), diskmap.end(), std::back_inserter(diskmapInt),
+                 [](const char &s) { return s - '0'; });
+
+  for (int i = 0; i < diskmapInt.size(); i++) {
+    res += i * diskmapInt[i];
+  }
+  std::cout << CYAN "\nfilesystem checksum is: " << BOLDYELLOW << res << RESET
+            << std::endl;
+}