diff --git a/input/day1.txt b/input/day1.txt
new file mode 100644
index 0000000..4a92b59
--- /dev/null
+++ b/input/day1.txt
@@ -0,0 +1,100 @@
+136583
+77036
+109200
+142168
+74357
+146941
+129306
+98180
+105195
+129127
+135956
+116070
+89198
+51306
+144552
+109900
+56658
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+104645
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+75010
+98644
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+72599
+63017
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+92195
+58221
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+144463
+140192
+143461
\ No newline at end of file
diff --git a/src/day1.cpp b/src/day1.cpp
new file mode 100644
index 0000000..35beba8
--- /dev/null
+++ b/src/day1.cpp
@@ -0,0 +1,36 @@
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <vector>
+#include <cmath>
+
+int main()
+{
+    std::string line;
+    std::ifstream input_file("../input/day1.txt");
+
+    auto part1_sum = 0;
+    auto part2_sum = 0;
+
+    if (input_file.is_open())
+    {
+        while (getline(input_file, line))
+        {
+            auto val = std::stoi(line);
+            auto calculated_value = std::floor(val / 3) - 2;
+
+            part1_sum += calculated_value;
+            while (calculated_value > 0)
+            {
+                part2_sum += calculated_value;
+                calculated_value = std::floor(calculated_value / 3) - 2;
+            }
+        }
+        input_file.close();
+    }
+
+    std::cout << "Part 1 Sum: " << part1_sum << std::endl;
+    std::cout << "Part 2 Sum: " << part2_sum << std::endl;
+
+    return 0;
+}
\ No newline at end of file