Created the advent of code day 1 challenge

aoc/01.cpp

@@ -0,0 +1,52 @@
+#include <iostream>
+#include <vector>
+#include <fstream>
+#include <map>
+
+using namespace std;
+
+// Advent of Code 2023, Day 1
+
+int main() {
+    ifstream input("input.txt");
+    map<string, string> numbers = {
+            {"1", "one"}, {"2", "two"}, {"3", "three"},
+            {"4", "four"}, {"5", "five"}, {"6", "six"},
+            {"7", "seven"}, {"8", "eight"}, {"9", "nine"}
+    };
+
+    int calibrationValue = 0;
+
+    for (string line; getline(input, line);) {
+        string current_str;
+        for (char current : line) {
+            current_str.push_back(current);
+
+            for (auto item : numbers) {
+                size_t index = current_str.find(item.second);
+
+                while(index != std::string::npos){
+                    current_str.replace(index, item.second.length(), item.first);
+                    index = current_str.find(item.second);
+                }
+            }
+        }
+        line = current_str;
+
+        vector<char> digits;
+        for (char current: line) {
+            if (isdigit(current)) digits.push_back(current);
+        }
+
+        string calibrationLine;
+        calibrationLine.push_back(digits[0]);
+        calibrationLine.push_back(digits.size() > 1 ? digits[digits.size() - 1] : digits[0]);
+
+        cout << "Calibration Value (" << line << "): " << calibrationLine << "\n";
+        calibrationValue += stoi(calibrationLine);
+    }
+
+    cout << "Calibration Value Sum: " << calibrationValue;
+
+    return 0;
+}