diff --git a/04/main.cpp b/04/main.cpp
index f949ea3..cf48d83 100644
--- a/04/main.cpp
+++ b/04/main.cpp
@@ -10,18 +10,18 @@ public:
     ~Bingo() = default;
 
     void addNumberToCard(int number) {
-        card[numbers / 5][numbers % 5] = {number, false};
+        card[numbers / 5][numbers % 5] = { number, false };
         numbers += 1;
     }
 
     void checkNumber(int number) {
-        if(hasWon()) {
+        if (hasWon()) {
             invalidate();
             return;
         }
-        for(int i = 0; i < 5; i++) {
-            for(int j = 0; j < 5; j++) {
-                if(card[i][j].first == number) {
+        for (int i = 0; i < 5; i++) {
+            for (int j = 0; j < 5; j++) {
+                if (card[i][j].first == number) {
                     card[i][j].second = true;
                     checkWin(number);
                     return;
@@ -40,9 +40,9 @@ public:
 
     void printSelf() {
         std::cout << std::endl;
-        for(int i = 0; i < 5; i++) {
-            for(int j = 0; j < 5; j++) {
-                if(card[i][j].second) {
+        for (int i = 0; i < 5; i++) {
+            for (int j = 0; j < 5; j++) {
+                if (card[i][j].second) {
                     std::cout << "*";
                 }
                 std::cout << card[i][j].first << " ";
@@ -58,18 +58,18 @@ public:
 
 private:
     void checkWin(int multiplier) {
-        for(int i = 0; i < 5; i++) {
+        for (int i = 0; i < 5; i++) {
             int horizontal = 0;
             int vertical = 0;
-            for(int j = 0; j < 5; j++) {
-                if(card[i][j].second) {
+            for (int j = 0; j < 5; j++) {
+                if (card[i][j].second) {
                     horizontal += 1;
                 }
-                if(card[j][i].second) {
+                if (card[j][i].second) {
                     vertical += 1;
                 }
             }
-            if(horizontal == 5 || vertical == 5) {
+            if (horizontal == 5 || vertical == 5) {
                 won = true;
                 calculateScore(multiplier);
             }
@@ -78,9 +78,9 @@ private:
 
     void calculateScore(int multiplier) {
         int score = 0;
-        for(int i = 0; i < 5; i++) {
-            for(int j = 0; j < 5; j++) {
-                if(!card[i][j].second) {
+        for (int i = 0; i < 5; i++) {
+            for (int j = 0; j < 5; j++) {
+                if (!card[i][j].second) {
                     score += card[i][j].first;
                 }
             }
@@ -92,15 +92,15 @@ private:
         valid = false;
     }
 
-
-    std::array<std::array<std::pair<int,bool>, 5>, 5> card;
+    std::array<std::array<std::pair<int, bool>, 5>, 5> card;
     int numbers = 0;
     bool won = false;
     int winning_score = -1;
     bool valid = true;
 };
 
-std::pair<std::vector<int>, std::vector<Bingo>> getBingo(const std::string &file_name) {
+std::pair<std::vector<int>, std::vector<Bingo>>
+getBingo(const std::string &file_name) {
     std::pair<std::vector<int>, std::vector<Bingo>> result;
 
     std::ifstream file(file_name);
@@ -109,17 +109,17 @@ std::pair<std::vector<int>, std::vector<Bingo>> getBingo(const std::string &file
     std::string str;
     std::getline(file, str);
     std::stringstream ss(str);
-    while(ss >> tmp) {
+    while (ss >> tmp) {
         result.first.push_back(tmp);
         ss >> tmp_char;
     }
     while (std::getline(file, str)) {
-        if(str.empty()) {
+        if (str.empty()) {
             result.second.emplace_back();
             continue;
         }
         std::stringstream ss2(str);
-        for(int i = 0; i < 5; i++) {
+        for (int i = 0; i < 5; i++) {
             ss2 >> tmp;
             result.second.back().addNumberToCard(tmp);
         }
@@ -128,10 +128,10 @@ std::pair<std::vector<int>, std::vector<Bingo>> getBingo(const std::string &file
 }
 
 int part1(const std::vector<int> &numbers, std::vector<Bingo> &bingo) {
-    for(auto &number : numbers) {
-        for(auto &card : bingo) {
+    for (auto &number : numbers) {
+        for (auto &card : bingo) {
             card.checkNumber(number);
-            if(card.hasWon()) {
+            if (card.hasWon()) {
                 return card.getWinningScore();
             }
         }
@@ -141,10 +141,10 @@ int part1(const std::vector<int> &numbers, std::vector<Bingo> &bingo) {
 
 int part2(const std::vector<int> &numbers, std::vector<Bingo> &bingo) {
     int last_score = -1;
-    for(auto &number : numbers) {
-        for(auto &card : bingo) {
+    for (auto &number : numbers) {
+        for (auto &card : bingo) {
             card.checkNumber(number);
-            if(card.hasWon() && card.isValid()) {
+            if (card.hasWon() && card.isValid()) {
                 last_score = card.getWinningScore();
             }
         }