diff --git a/day1/day1.cpp b/day1/day1.cpp
index 0f9a082..d84ef63 100644
--- a/day1/day1.cpp
+++ b/day1/day1.cpp
@@ -2,7 +2,6 @@
 #include <iostream>
 #include <set>
 #include <string>
-#include <vector>
 
 constexpr int TARGET_NUM = 2020;
 
@@ -12,49 +11,49 @@ constexpr int TARGET_NUM = 2020;
  * @return std::set<int> A set of the numbers in the input
  */
 std::set<int> read_input(const std::string &filename) {
-  std::set<int> input;
-  std::string line;
-  std::ifstream file(filename);
+	std::set<int> input;
+	std::string line;
+	std::ifstream file(filename);
 
-  while (std::getline(file, line)) {
-    int num = std::stoi(line);
-    input.insert(num);
-  }
+	while (std::getline(file, line)) {
+		int num = std::stoi(line);
+		input.insert(num);
+	}
 
-  return input;
+	return input;
 }
 
 int part1(const std::set<int> &inputs) {
-  for (int num : inputs) {
-    int desired = TARGET_NUM - num;
-    if (inputs.find(desired) != inputs.end()) {
-      return desired * num;
-    }
-  }
+	for (int num : inputs) {
+		int desired = TARGET_NUM - num;
+		if (inputs.find(desired) != inputs.end()) {
+			return desired * num;
+		}
+	}
 
-  throw std::runtime_error("Does not contain solution");
+	throw std::runtime_error("Does not contain solution");
 }
 
 int part2(const std::set<int> &inputs) {
-  for (int num : inputs) {
-    for (int num2 : inputs) {
-      int desired = TARGET_NUM - (num + num2);
-      if (inputs.find(desired) != inputs.end()) {
-        return desired * num2 * num;
-      }
-    }
-  }
+	for (int num : inputs) {
+		for (int num2 : inputs) {
+			int desired = TARGET_NUM - (num + num2);
+			if (inputs.find(desired) != inputs.end()) {
+				return desired * num2 * num;
+			}
+		}
+	}
 
-  throw std::runtime_error("Does not contain solution");
+	throw std::runtime_error("Does not contain solution");
 }
 
 int main(int argc, const char *argv[]) {
-  if (argc != 2) {
-    std::cerr << "./day1 <input_file>" << std::endl;
-    return 1;
-  }
+	if (argc != 2) {
+		std::cerr << "./day1 <input_file>" << std::endl;
+		return 1;
+	}
 
-  std::set<int> inputs = read_input(argv[1]);
-  std::cout << part1(inputs) << std::endl;
-  std::cout << part2(inputs) << std::endl;
+	std::set<int> inputs = read_input(argv[1]);
+	std::cout << part1(inputs) << std::endl;
+	std::cout << part2(inputs) << std::endl;
 }