diff --git a/Zadanie-03/.idea/vcs.xml b/Zadanie-03/.idea/vcs.xml
new file mode 100644
index 0000000..6c0b863
--- /dev/null
+++ b/Zadanie-03/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/Zadanie-03/src/com/tylkowski/crc/CrcTask.java b/Zadanie-03/src/com/tylkowski/crc/CrcTask.java
new file mode 100644
index 0000000..6791b26
--- /dev/null
+++ b/Zadanie-03/src/com/tylkowski/crc/CrcTask.java
@@ -0,0 +1,13 @@
+package com.tylkowski.crc;
+
+import java.util.Arrays;
+
+public class CrcTask {
+    private String message;
+    private String polyGenerator;
+
+    public CrcTask(String message) {
+        this.message = message;
+        this.polyGenerator = "10001000000100001";
+    }
+}
diff --git a/Zadanie-03/src/com/tylkowski/crc/Main.java b/Zadanie-03/src/com/tylkowski/crc/Main.java
new file mode 100644
index 0000000..00dad62
--- /dev/null
+++ b/Zadanie-03/src/com/tylkowski/crc/Main.java
@@ -0,0 +1,21 @@
+package com.tylkowski.crc;
+
+public class Main {
+
+    public static void main(String[] args) {
+        CrcTask crcTask = new CrcTask(toBinary(args[0]));
+    }
+
+    private static String toBinary(String s) {
+        byte[] bytes = s.getBytes();
+        StringBuilder binary = new StringBuilder();
+        for (byte b : bytes) {
+            int val = b;
+            for (int i = 0; i < 8; i++) {
+                binary.append((val & 128) == 0 ? 0 : 1);
+                val <<= 1;
+            }
+        }
+        return binary.toString();
+    }
+}