diff --git a/2025.05.02/dist/Krivoruchenko_SK/init_f.c b/2025.05.02/dist/Krivoruchenko_SK/init_f.c
index 7314dd0..8c30b0c 100644
--- a/2025.05.02/dist/Krivoruchenko_SK/init_f.c
+++ b/2025.05.02/dist/Krivoruchenko_SK/init_f.c
@@ -4,12 +4,23 @@
 
 
 static int cl = 0;
+static int cl_d = 0;
 
 int get_call_count (void) 
 {
 	return cl;
 }
 
+int get_call_function_count (void) 
+{
+	return cl_f;
+}
+
+int get_call_derivative_count (void)
+{
+	return cl_d;
+}
+
 double f0 (double x)
 {
 	cl++;
@@ -18,12 +29,27 @@ double f0 (double x)
 	return 1;
 }
 
+double d0 (double x)
+{
+	cl_d++;
+	(void)x;
+
+	return 0;
+}
+
 double f1 (double x)
 {
 	cl++;
 	return (x * 1e-100) - 1.0;
 }
 
+double d1 (double x)
+{
+	(void)x;
+	cl_d++;
+	return 1;
+}
+
 double f2 (double x)
 {
 	double x_2 = x * x;
@@ -31,6 +57,12 @@ double f2 (double x)
 	return 4 - x_2;
 }
 
+double d2 (double x)
+{
+	cl_d++;
+	return -2 * x;
+}
+
 double f3 (double x)
 {
 	double x_2 = x * x;
@@ -40,6 +72,13 @@ double f3 (double x)
 	return x_3 + 3 * x_2 + 16;
 }
 
+double d3 (double x)
+{
+	cl_d++;
+
+	return 3 * x * x + 6 * x;
+}
+
 double f4 (double x)
 {
 	double x_2 = x * x;
@@ -49,6 +88,13 @@ double f4 (double x)
 	return 3 - 2 * x_2 - x_4;
 }
 
+double d4 (double x)
+{
+	cl_d++;
+
+	return -4 * x - 4 * ((x * x) * x);
+}
+
 double f5 (double x)
 {
 	double sq_x = sqrt(fabs(x) + 1);
@@ -56,6 +102,16 @@ double f5 (double x)
 	return sq_x - 2;
 }
 
+double d5 (double x)
+{
+	cl_d++;
+	if (x < -DBL_EPSILON)
+		return (-1.0 / (sqrt(fabs(x) + 1))) * 0.5;
+	else if (x > DBL_EPSILON)
+		return (1.0 / (sqrt(fabs(x) + 1))) * 0.5;
+	return 0;
+}
+
 double f6 (double x)
 {
 	double sq_x = sqrt(fabs(x) + 1);
@@ -64,3 +120,14 @@ double f6 (double x)
 	return sq - 2;
 }
 
+double d6 (double x)
+{
+	double sqrt_x = sqrt(fabs(x) + 1);
+	cl_d++;
+	
+	if (x < -DBL_EPSILON)
+		return (-1.0 / (sqrt(sqrt_x + 1) * sqrt_x)) * 0.25;
+	else if (x > DBL_EPSILON)
+		return (1.0 / (sqrt(sqrt_x + 1) * sqrt_x)) * 0.25;
+	return 0;
+}
\ No newline at end of file