diff --git a/include/field.h b/include/field.h
index ccd0160..8753768 100755
--- a/include/field.h
+++ b/include/field.h
@@ -1,7 +1,7 @@
 #pragma once
 
 #include "line.h"
-#include "types.h"
+#include "types.hpp"
 
 #include <stdio.h>
 #include <vector>
diff --git a/include/line.h b/include/line.h
index 08de56f..aa369ae 100644
--- a/include/line.h
+++ b/include/line.h
@@ -1,4 +1,4 @@
-#include "types.h"
+#include "types.hpp"
 
 #include <vector>
 
diff --git a/include/types.h b/include/types.hpp
similarity index 56%
rename from include/types.h
rename to include/types.hpp
index 4f9c837..48ae3bf 100644
--- a/include/types.h
+++ b/include/types.hpp
@@ -16,4 +16,11 @@ struct Position {
 
     Position() : x(0), y(0) {}
     Position(int x, int y) : x(x), y(y) {}
+
+    bool operator==(const Position& other) const {
+        return ((this->x == other.x) && (this->y == other.y));
+    }
+    bool operator!=(const Position& other) const {
+        return !(*this == other);
+    }
 };
\ No newline at end of file
diff --git a/main.cpp b/main.cpp
index 8273c7d..70d90d7 100755
--- a/main.cpp
+++ b/main.cpp
@@ -5,11 +5,16 @@
 
 using Tile = unsigned long long int;
 
-void printVecOfPos(const std::vector<Position> &positions) {
-    for (const auto &pos : positions) {
-        std::cout << pos.x << ' ' << pos.y << '\n';
+// [debug]
+void printVecOfPos(const std::vector<Position> &positions, int fieldSize) {
+    for (int i = 0; i < fieldSize; ++i) {
+        for (int j = 0; j < fieldSize; ++j) {
+            std::cout << (std::find(positions.begin(), positions.end(), Position(i, j)) != positions.end() ? 1 : 0) << ' ';
+        }
+        std::cout << '\n';
     }
 }
+// [debug]
 
 int main() {
     Field field(4);