diff --git a/2024/task13.cpp b/2024/task13.cpp
new file mode 100644
index 0000000..83637a4
--- /dev/null
+++ b/2024/task13.cpp
@@ -0,0 +1,25 @@
+#include <iostream>
+using namespace std;
+
+// "4566" => "45+66=-21"
+int main ()
+{
+	int a;
+
+	cin >> a;
+
+	int d1, d2, d3, d4;
+
+	d1 = a % 10;
+	d2 = a / 10 % 10;
+	d3 = a / 100 % 10;
+	d4 = a / 1000;
+	
+	int a1, a2;
+	a1 = d4 * 10 + d3;
+	a2 = d2 * 10 + d1;
+
+	cout << a1 << '-' << a2 << '=' << a1-a2;
+
+	return 0;
+}