diff --git a/2025.05.02/02Ex/io_status.h b/2025.05.02/02Ex/io_status.h
deleted file mode 100644
index 8867bee..0000000
--- a/2025.05.02/02Ex/io_status.h
+++ /dev/null
@@ -1,16 +0,0 @@
-#ifndef IO_STATUS_H
-#define IO_STATUS_H
-
-#define ERR_MEM	"Error: Not enough memory!"
-#define ERR_OPEN "Error: Cannot open file"
-#define ERR_READ "Error: Cannot read file"
-#define ERR_FUNC "Error: Algorithm is not applicable!"
-
-typedef enum _io_status
-{
-	SUCCESS,
-	ERROR_OPEN,
-	ERROR_READ
-} io_status;
-
-#endif
diff --git a/2025.05.02/02Ex/main.c b/2025.05.02/02Ex/main.c
index abb10e8..0c0d7c0 100644
--- a/2025.05.02/02Ex/main.c
+++ b/2025.05.02/02Ex/main.c
@@ -12,8 +12,8 @@ int main(int argc, char *argv[])
 	int m, k, cl, it, task = 2;
 	
 	double (*f) (double);
-	double (*f_lst[]) (double) = {f0, f1, f2, f3, f4, f5, f6, sin}; // TODO: Remove sin
-	double (*d_lst[]) (double) = {d0, d1, d2, d3, d4, d5, d6, cos}; // TODO: Remove cos
+	double (*f_lst[]) (double) = {f0, f1, f2, f3, f4, f5, f6};
+	double (*d_lst[]) (double) = {d0, d1, d2, d3, d4, d5, d6};
 	int len_f = sizeof(f_lst) / sizeof(f_lst[0]);
 
 
@@ -36,13 +36,13 @@ int main(int argc, char *argv[])
 		
 	cl = get_call_function_count();
 
-	if (it > m)
+	if (it < 0)
 	{
 		fprintf(stdout, "%s : Task = %d NOT FOUND Count = %d T = %.2f\n", argv[0], task, cl, t);
 		return -2;
 	} else
 	{
-		printf("%s : Task = %d X = %e Res = %e Its = %d Count = %d T = %.2f\n", argv[0], task, x, f(x), it, cl, t);
+		fprintf(stdout, "%s : Task = %d X = %e Res = %e Its = %d Count = %d T = %.2f\n", argv[0], task, x, f(x), it, cl, t);
 		return 0;
 	}
 }
diff --git a/2025.05.02/02Ex/solve.c b/2025.05.02/02Ex/solve.c
index d53ea28..b288e9c 100644
--- a/2025.05.02/02Ex/solve.c
+++ b/2025.05.02/02Ex/solve.c
@@ -21,12 +21,15 @@ int t2_solve (
 		
 		if (fabs(dy) < DBL_EPSILON)
 		{
-			it = m+1;
+			it = -1;
 			break;
 		}
 
 		x_0 -= (y / dy);
 	}
+
+	if (it > m)
+		it = -1;
 	
 	*x = x_0;
 	return it;
diff --git a/2025.05.02/08Ex/solve.c b/2025.05.02/08Ex/solve.c
index aab65a9..de3a921 100644
--- a/2025.05.02/08Ex/solve.c
+++ b/2025.05.02/08Ex/solve.c
@@ -2,8 +2,6 @@
 
 #include <math.h>
 #include <float.h>
-#include <stdbool.h>
-
 
 int t8_solve (
 		double (*f) (double), 
diff --git a/2025.05.02/Krivoruchenko_SK.zip b/2025.05.02/Krivoruchenko_SK.zip
new file mode 100644
index 0000000..4f1eecb
Binary files /dev/null and b/2025.05.02/Krivoruchenko_SK.zip differ
diff --git a/2025.05.02/dist/Krivoruchenko_SK/Makefile b/2025.05.02/dist/Krivoruchenko_SK/Makefile
new file mode 100644
index 0000000..885b0c6
--- /dev/null
+++ b/2025.05.02/dist/Krivoruchenko_SK/Makefile
@@ -0,0 +1,14 @@
+FLAGS = -fstack-protector-all -W -Wall -Wextra -Wunused -Wcast-align -Werror -pedantic -pedantic-errors -Wfloat-equal -Wpointer-arith -Wformat-security -Wmissing-format-attribute -Wformat=1 -Wwrite-strings -Wcast-align -Wno-long-long -std=gnu99 -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wold-style-definition -Wdeclaration-after-statement -Wbad-function-cast -Wnested-externs -O3
+
+%.out: %.o solve.o init_f.o
+	 gcc $(FLAGS) $^ -o $@ -lm
+%.o: %.c
+	 gcc -c $(FLAGS) $<
+
+all: a01.out a02.out a03.out a04.out a07.out a08.out
+
+solve.o: solve.c solve.h
+init_f.o: init_f.c init_f.h
+
+clean:
+	 rm -f *.o *.out
diff --git a/2025.05.02/dist/Krivoruchenko_SK/a01.c b/2025.05.02/dist/Krivoruchenko_SK/a01.c
new file mode 100644
index 0000000..442f122
--- /dev/null
+++ b/2025.05.02/dist/Krivoruchenko_SK/a01.c
@@ -0,0 +1,49 @@
+#include <stdio.h>
+#include <time.h>
+#include <math.h>
+
+#include "init_f.h"
+#include "solve.h"
+
+/* ./a.out a b eps M k */
+int main(int argc, char *argv[])
+{
+	double t, a, b, eps, x = 0;
+	int m, k, cl, it, task = 1;
+	
+	double (*f) (double);
+	double (*f_lst[]) (double) = {f0, f1, f2, f3, f4, f5, f6};
+	int len_f = sizeof(f_lst) / sizeof(f_lst[0]);
+
+	if (
+			!((argc == 6) && 
+			sscanf(argv[1], "%lf", &a) == 1 &&
+			sscanf(argv[2], "%lf", &b) == 1 &&
+			(a <= b) &&
+			(sscanf(argv[3], "%lf", &eps) == 1 && (eps >= 0)) &&
+			((sscanf(argv[4], "%d", &m) == 1) && m > 0) &&
+			((sscanf(argv[5], "%d", &k) == 1) && ((0 <= k) && (k <= len_f))))
+	) {
+		fprintf(stderr, "Usage: %s a b eps M k\n", argv[0]);
+		return -1;
+	}
+
+	f = f_lst[k];
+
+	t = clock();
+	it = t1_solve(f, a, b, eps, m, &x);
+	t = (clock() - t) / CLOCKS_PER_SEC;
+		
+	cl = get_call_count();
+	
+	if (it < 0)
+	{
+		fprintf(stdout, "%s : Task = %d NOT FOUND Count = %d T = %.2f\n", argv[0], task, cl, t);
+		return -2;
+	} else 
+	{
+		printf("%s : Task = %d X = %e Res = %e Its = %d Count = %d T = %.2f\n", argv[0], task, x, f(x), it, cl, t);
+		return 0;
+	}
+}
+
diff --git a/2025.05.02/dist/Krivoruchenko_SK/a02.c b/2025.05.02/dist/Krivoruchenko_SK/a02.c
new file mode 100644
index 0000000..0c0d7c0
--- /dev/null
+++ b/2025.05.02/dist/Krivoruchenko_SK/a02.c
@@ -0,0 +1,49 @@
+#include <stdio.h>
+#include <time.h>
+#include <math.h>
+
+#include "init_f.h"
+#include "solve.h"
+
+/* ./a.out x_0 eps M k */
+int main(int argc, char *argv[])
+{
+	double t, x_0, eps, x = 0;
+	int m, k, cl, it, task = 2;
+	
+	double (*f) (double);
+	double (*f_lst[]) (double) = {f0, f1, f2, f3, f4, f5, f6};
+	double (*d_lst[]) (double) = {d0, d1, d2, d3, d4, d5, d6};
+	int len_f = sizeof(f_lst) / sizeof(f_lst[0]);
+
+
+	if (
+			!((argc == 5) && 
+			sscanf(argv[1], "%lf", &x_0) == 1 &&
+			(sscanf(argv[2], "%lf", &eps) == 1 && (eps >= 0)) &&
+			((sscanf(argv[3], "%d", &m) == 1) && (m > 0)) &&
+			((sscanf(argv[4], "%d", &k) == 1) && ((0 <= k) && (k <= len_f))))
+	) {
+		fprintf(stderr, "Usage: %s x_0 eps M k\n", argv[0]);
+		return -1;
+	}
+
+	f = f_lst[k];
+
+	t = clock();
+	it = t2_solve(f, d_lst[k], x_0, eps, m, &x);
+	t = (clock() - t) / CLOCKS_PER_SEC;
+		
+	cl = get_call_function_count();
+
+	if (it < 0)
+	{
+		fprintf(stdout, "%s : Task = %d NOT FOUND Count = %d T = %.2f\n", argv[0], task, cl, t);
+		return -2;
+	} else
+	{
+		fprintf(stdout, "%s : Task = %d X = %e Res = %e Its = %d Count = %d T = %.2f\n", argv[0], task, x, f(x), it, cl, t);
+		return 0;
+	}
+}
+
diff --git a/2025.05.02/dist/Krivoruchenko_SK/a03.c b/2025.05.02/dist/Krivoruchenko_SK/a03.c
new file mode 100644
index 0000000..0dc3eb4
--- /dev/null
+++ b/2025.05.02/dist/Krivoruchenko_SK/a03.c
@@ -0,0 +1,49 @@
+#include <stdio.h>
+#include <time.h>
+#include <math.h>
+
+#include "init_f.h"
+#include "solve.h"
+
+/* ./a.out a b eps M k */
+int main(int argc, char *argv[])
+{
+	double t, a, b, eps, x = 0;
+	int m, k, cl, it, task = 3;
+	
+	double (*f) (double);
+	double (*f_lst[]) (double) = {f0, f1, f2, f3, f4, f5, f6};
+	int len_f = sizeof(f_lst) / sizeof(f_lst[0]);
+
+	if (
+			!((argc == 6) && 
+			sscanf(argv[1], "%lf", &a) == 1 &&
+			sscanf(argv[2], "%lf", &b) == 1 &&
+			(a <= b) &&
+			(sscanf(argv[3], "%lf", &eps) == 1 && (eps >= 0)) &&
+			((sscanf(argv[4], "%d", &m) == 1) && m > 0) &&
+			((sscanf(argv[5], "%d", &k) == 1) && ((0 <= k) && (k <= len_f))))
+	) {
+		fprintf(stderr, "Usage: %s a b eps M k\n", argv[0]);
+		return -1;
+	}
+
+	f = f_lst[k];
+
+	t = clock();
+	it = t3_solve(f, a, b, eps, m, &x);
+	t = (clock() - t) / CLOCKS_PER_SEC;
+		
+	cl = get_call_count();
+
+	if (it < 0)
+	{
+		fprintf(stdout, "%s : Task = %d NOT FOUND Count = %d T = %.2f\n", argv[0], task, cl, t);
+		return -2;
+	} else
+	{
+		fprintf(stdout, "%s : Task = %d X = %e Res = %e Its = %d Count = %d T = %.2f\n", argv[0], task, x, f(x), it, cl, t);
+		return 0;
+	}
+}
+
diff --git a/2025.05.02/dist/Krivoruchenko_SK/a04.c b/2025.05.02/dist/Krivoruchenko_SK/a04.c
new file mode 100644
index 0000000..3403844
--- /dev/null
+++ b/2025.05.02/dist/Krivoruchenko_SK/a04.c
@@ -0,0 +1,49 @@
+#include <stdio.h>
+#include <time.h>
+#include <math.h>
+
+#include "init_f.h"
+#include "solve.h"
+
+/* ./a.out a b eps M k */
+int main(int argc, char *argv[])
+{
+	double t, a, b, eps, x = 0;
+	int m, k, cl, it, task = 4;
+	
+	double (*f) (double);
+	double (*f_lst[]) (double) = {f0, f1, f2, f3, f4, f5, f6};
+	int len_f = sizeof(f_lst) / sizeof(f_lst[0]);
+
+	if (
+			!((argc == 6) && 
+			sscanf(argv[1], "%lf", &a) == 1 &&
+			sscanf(argv[2], "%lf", &b) == 1 &&
+			(a <= b) &&
+			(sscanf(argv[3], "%lf", &eps) == 1 && (eps >= 0)) &&
+			((sscanf(argv[4], "%d", &m) == 1) && m > 0) &&
+			((sscanf(argv[5], "%d", &k) == 1) && ((0 <= k) && (k <= len_f))))
+	) {
+		fprintf(stderr, "Usage: %s a b eps M k\n", argv[0]);
+		return -1;
+	}
+
+	f = f_lst[k];
+
+	t = clock();
+	it = t4_solve(f, a, b, eps, m, &x);
+	t = (clock() - t) / CLOCKS_PER_SEC;
+		
+	cl = get_call_count();
+
+	if (it < 0)
+	{
+		fprintf(stdout, "%s : Task = %d NOT FOUND Count = %d T = %.2f\n", argv[0], task, cl, t);
+		return -2;
+	} else
+	{
+		printf("%s : Task = %d X = %e Res = %e Its = %d Count = %d T = %.2f\n", argv[0], task, x, f(x), it, cl, t);
+		return 0;
+	}
+}
+
diff --git a/2025.05.02/dist/Krivoruchenko_SK/a07.c b/2025.05.02/dist/Krivoruchenko_SK/a07.c
new file mode 100644
index 0000000..c426a06
--- /dev/null
+++ b/2025.05.02/dist/Krivoruchenko_SK/a07.c
@@ -0,0 +1,47 @@
+#include <stdio.h>
+#include <time.h>
+#include <math.h>
+
+#include "init_f.h"
+#include "solve.h"
+
+/* ./a.out x_0 eps M k */
+int main(int argc, char *argv[])
+{
+	double t, x_0, eps, x = 0;
+	int m, k, cl, it, task = 7;
+	
+	double (*f) (double);
+	double (*f_lst[]) (double) = {f0, f1, f2, f3, f4, f5, f6};
+	int len_f = sizeof(f_lst) / sizeof(f_lst[0]);
+
+	if (
+			!((argc == 5) && 
+			sscanf(argv[1], "%lf", &x_0) == 1 &&
+			(sscanf(argv[2], "%lf", &eps) == 1 && (eps >= 0)) &&
+			((sscanf(argv[3], "%d", &m) == 1) && (m > 0)) &&
+			((sscanf(argv[4], "%d", &k) == 1) && ((0 <= k) && (k <= len_f))))
+	) {
+		fprintf(stderr, "Usage: %s x_0 eps M k\n", argv[0]);
+		return -1;
+	}
+
+	f = f_lst[k];
+
+	t = clock();
+	it = t7_solve(f, x_0, eps, m, &x);
+	t = (clock() - t) / CLOCKS_PER_SEC;
+		
+	cl = get_call_count();
+
+	if (it < 0)
+	{
+		fprintf(stdout, "%s : Task = %d NOT FOUND Count = %d T = %.2f\n", argv[0], task, cl, t);
+		return -2;
+	} else
+	{
+		printf("%s : Task = %d X = %e Res = %e Its = %d Count = %d T = %.2f\n", argv[0], task, x, f(x), it, cl, t);
+		return 0;
+	}
+}
+
diff --git a/2025.05.02/dist/Krivoruchenko_SK/a08.c b/2025.05.02/dist/Krivoruchenko_SK/a08.c
new file mode 100644
index 0000000..4c307e6
--- /dev/null
+++ b/2025.05.02/dist/Krivoruchenko_SK/a08.c
@@ -0,0 +1,49 @@
+#include <stdio.h>
+#include <time.h>
+#include <math.h>
+
+#include "init_f.h"
+#include "solve.h"
+
+/* ./a.out a b eps M k */
+int main(int argc, char *argv[])
+{
+	double t, a, b, eps, x = 0;
+	int m, k, it, cl, task = 8;
+	
+	double (*f) (double);
+	double (*f_lst[]) (double) = {f0, f1, f2, f3, f4, f5, f6};
+	int len_f = sizeof(f_lst) / sizeof(f_lst[0]);
+
+	if (
+			!((argc == 6) && 
+			sscanf(argv[1], "%lf", &a) == 1 &&
+			sscanf(argv[2], "%lf", &b) == 1 &&
+			(a <= b) &&
+			(sscanf(argv[3], "%lf", &eps) == 1 && (eps >= 0)) &&
+			((sscanf(argv[4], "%d", &m) == 1) && m > 0) &&
+			((sscanf(argv[5], "%d", &k) == 1) && ((0 <= k) && (k <= len_f))))
+	) {
+		fprintf(stderr, "Usage: %s a b eps M k\n", argv[0]);
+		return -1;
+	}
+
+	f = f_lst[k];
+
+	t = clock();
+	it = t8_solve(f, a, b, eps, m, &x);
+	t = (clock() - t) / CLOCKS_PER_SEC;
+		
+	cl = get_call_count();
+
+	if (it < 0)
+	{
+		fprintf(stdout, "%s : Task = %d NOT FOUND Count = %d T = %.2f\n", argv[0], task, cl, t);
+		return -2;
+	} else 
+	{
+		fprintf(stdout, "%s : Task = %d X = %e Res = %e Its = %d Count = %d T = %.2f\n", argv[0], task, x, f(x), it, cl, t);
+		return 0;
+	}
+}
+
diff --git a/2025.05.02/dist/Krivoruchenko_SK/init_f.c b/2025.05.02/dist/Krivoruchenko_SK/init_f.c
new file mode 100644
index 0000000..b14a5a9
--- /dev/null
+++ b/2025.05.02/dist/Krivoruchenko_SK/init_f.c
@@ -0,0 +1,128 @@
+#include "init_f.h"
+
+#include <math.h>
+#include <float.h>
+
+
+static int cl_f = 0;
+static int cl_d = 0;
+
+int get_call_count (void) 
+{
+	return cl_f;
+}
+
+int get_call_function_count (void) 
+{
+	return cl_f;
+}
+
+int get_call_derivative_count (void)
+{
+	return cl_d;
+}
+
+double f0 (double x)
+{
+	cl_f++;
+	(void)x;
+
+	return 1;
+}
+
+double d0 (double x)
+{
+	cl_d++;
+	(void)x;
+
+	return 0;
+}
+
+double f1 (double x)
+{
+	cl_f++;
+	return ((x * 1e-100) - 1.0) * 1e100;
+}
+
+double d1 (double x)
+{
+	(void)x;
+	cl_d++;
+	return 1;
+}
+
+double f2 (double x)
+{
+	cl_f++;
+	return 4 - x * x;
+}
+
+double d2 (double x)
+{
+	cl_d++;
+	return -2 * x;
+}
+
+double f3 (double x)
+{
+	double x_2 = x * x;
+	cl_f++;
+
+	return x * x_2 + 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;
+	cl_f++;
+
+	return 3 - 2 * x_2 - x_2 * x_2;
+}
+
+double d4 (double x)
+{
+	cl_d++;
+
+	return -4 * x - 4 * ((x * x) * x);
+}
+
+double f5 (double x)
+{
+	cl_f++;
+	return sqrt(fabs(x) + 1) - 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)
+{
+	cl_f++;
+	return sqrt(sqrt(fabs(x) + 1) + 1) - 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;
+}
diff --git a/2025.05.02/dist/Krivoruchenko_SK/init_f.h b/2025.05.02/dist/Krivoruchenko_SK/init_f.h
new file mode 100644
index 0000000..c927c42
--- /dev/null
+++ b/2025.05.02/dist/Krivoruchenko_SK/init_f.h
@@ -0,0 +1,29 @@
+#ifndef INIT_F_H
+#define INIT_F_H
+
+int get_call_count (void);
+int get_call_function_count (void) ;
+int get_call_derivative_count (void);
+
+double f0 (double x);
+double d0 (double x);
+
+double f1 (double x);
+double d1 (double x);
+
+double f2 (double x);
+double d2 (double x);
+
+double f3 (double x);
+double d3 (double x);
+
+double f4 (double x);
+double d4 (double x);
+
+double f5 (double x);
+double d5 (double x);
+
+double f6 (double x);
+double d6 (double x);
+
+#endif
diff --git a/2025.05.02/dist/Krivoruchenko_SK/solve.c b/2025.05.02/dist/Krivoruchenko_SK/solve.c
new file mode 100644
index 0000000..34dfbde
--- /dev/null
+++ b/2025.05.02/dist/Krivoruchenko_SK/solve.c
@@ -0,0 +1,295 @@
+#include "solve.h"
+
+#include <math.h>
+#include <float.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <string.h>
+
+int t1_solve (
+		double (*f) (double), 
+		double a, double b, 
+		double eps, int m, double *x
+) {
+	int it = 0;
+	uint64_t bits;
+	double c = DBL_MAX, y, y_a = f(a), y_b = f(b);
+	bool sgn_a, sgn_b, sgn_c;
+
+	memcpy(&bits, &y_a, sizeof(bits));
+	sgn_a = (bits >> 63) & 1;
+	memcpy(&bits, &y_b, sizeof(bits));
+	sgn_b = (bits >> 63) & 1;
+
+	if (fabs(y_a) - eps < DBL_EPSILON)
+	{
+		*x = a;
+		return 1;
+	} if (fabs(y_b) - eps < DBL_EPSILON)
+	{
+		*x = b;
+		return 1;
+	}
+
+	if (sgn_a == sgn_b)
+	{
+		*x = DBL_MAX;
+		return -1;
+	}
+	
+	for (it = 1; it <= m; ++it)
+	{
+		c = (a + b) * 0.5;
+		y = f(c);
+		
+		memcpy(&bits, &y, sizeof(bits));
+		sgn_c = (bits >> 63) & 1;
+		
+		if (fabs(y) - eps < DBL_EPSILON)
+			break;
+		else if ((fabs(c - a) < DBL_EPSILON) || (fabs(c - b) < DBL_EPSILON))
+			it = m+1;
+		else if (sgn_c == sgn_a)
+		{
+			a = c;
+			y_a = y;
+		} else if (sgn_c == sgn_b)
+		{
+			b = c;
+			y_b = y;
+		}
+	}
+	
+	if (it > m)
+		it = -1;
+	
+	*x = c;
+
+	return it;
+}
+
+int t2_solve (
+		double (*f) (double), 
+		double (*d) (double), 
+		double x_0, double eps, 
+		int m, double *x
+) {
+	int it = 0;
+
+	for (it = 1; it <= m; ++it)
+	{	
+		double y = f(x_0);
+		double dy = d(x_0);
+
+		if (fabs(y) - eps < DBL_EPSILON)
+			break;
+		
+		if (fabs(dy) < DBL_EPSILON)
+		{
+			it = -1;
+			break;
+		}
+
+		x_0 -= (y / dy);
+	}
+
+	if (it > m)
+		it = -1;
+	
+	*x = x_0;
+	return it;
+}
+
+int t3_solve (
+		double (*f) (double), 
+		double a, double b, 
+		double eps, int m, double *x
+) {
+	int it = 0;
+	uint64_t bits;
+	double c = DBL_MAX, y, y_a = f(a), y_b = f(b);
+	bool sgn_a, sgn_b, sgn_c;
+
+	memcpy(&bits, &y_a, sizeof(bits));
+	sgn_a = (bits >> 63) & 1;
+	memcpy(&bits, &y_b, sizeof(bits));
+	sgn_b = (bits >> 63) & 1;
+
+	if (fabs(y_a) - eps < DBL_EPSILON)
+	{
+		*x = a;
+		return 1;
+	} if (fabs(y_b) - eps < DBL_EPSILON)
+	{
+		*x = b;
+		return 1;
+	}
+
+	if (sgn_a == sgn_b)
+	{
+		*x = DBL_MAX;
+		return -1;
+	}
+	
+	for (it = 1; it <= m; ++it)
+	{
+		c = a - ((a - b) / (y_a - y_b)) * y_a;
+		y = f(c);
+		
+		memcpy(&bits, &y, sizeof(bits));
+		sgn_c = (bits >> 63) & 1;
+		
+		if ((c - a < DBL_EPSILON) || (c - b > DBL_EPSILON))
+			it = m+1;
+		else if (fabs(y) - eps < DBL_EPSILON)
+			break;
+		else if (sgn_c == sgn_a)
+		{	
+			a = c;
+			y_a = y;
+		} else if (sgn_c == sgn_b)
+		{
+			b = c;
+			y_b = y;
+		}
+	}
+	
+	if (it > m)
+		it = -1;
+	
+	*x = c;
+
+	return it;
+}
+
+int t4_solve (
+		double (*f) (double), 
+		double a, double b, 
+		double eps, int m, double *x
+) {
+	int it = 0;
+	double c = DBL_MAX, y, y_a = f(a), y_b = f(b);
+
+	if (fabs(y_a) - eps < DBL_EPSILON)
+	{
+		*x = a;
+		return 1;
+	} if (fabs(y_b) - eps < DBL_EPSILON)
+	{
+		*x = b;
+		return 1;
+	} if (fabs(fabs(y_b) - fabs(y_a)) < DBL_EPSILON)
+	{
+		*x = a;
+		return -1;
+	}
+
+	for (it = 1; it <= m; ++it)
+	{
+		c = b - ((b - a) / (y_b - y_a)) * y_b;
+		y = f(c);
+		
+		if (fabs(y) - eps < DBL_EPSILON)
+			break;
+		else if (fabs(y_a) - fabs(y_b) > DBL_EPSILON)
+		{
+			a = c;
+			y_a = y;
+		} else if (fabs(y_b) - fabs(y_a) > DBL_EPSILON)
+		{
+			b = c;
+			y_b = y;
+		} else
+			it = m+1;
+	}
+	
+	if (it > m)
+		it = -1;
+	
+	*x = c;
+
+	return it;
+}
+
+int t7_solve (
+		double (*f) (double), 
+		double x_0, double eps, 
+		int m, double *x
+) {
+	int it = 0;
+	double y = f(x_0);
+
+	if (fabs(y - x_0) - eps < DBL_EPSILON)
+	{
+		*x = x_0;
+		return 1;
+	}
+
+	for (it = 1; it <= m; ++it)
+	{
+		x_0 = y;
+		y = f(x_0);
+		
+		if (fabs(y - x_0) - eps < DBL_EPSILON)
+			break;
+	}
+
+	if (it > m)
+		it = -1;
+	
+	*x = x_0;
+
+	return it;
+}
+
+int t8_solve (
+		double (*f) (double), 
+		double a, double b, 
+		double eps, int m, double *x
+) {
+	int it = 1;
+	double x_l = 0, y_l = 0, c = a, y = f(a);
+
+	if (fabs(b - a) < DBL_EPSILON)
+	{
+		*x = a;
+		return 1;
+	}
+
+	for (double h = (b - a) * 0.1; fabs(h) > DBL_EPSILON; h *= -0.1)
+	{
+		do {
+			if (it > m)
+				break;
+
+			it++;
+			x_l = c;
+			y_l = y;
+			
+			c += h;
+			y = f(c);
+		} while (((y - y_l) - eps) > DBL_EPSILON);
+		
+		if (it > m)
+		{
+			it = -1;
+			break;
+		}
+
+		if ((c - b) > DBL_EPSILON)
+		{
+			x_l = b;
+			y_l = f(b);
+			break;
+		} else if ((a - c) > DBL_EPSILON)
+		{
+			x_l = a;
+			y_l = f(b);
+			break;
+		}
+	}
+	
+	*x = x_l;
+
+	return it;
+}
diff --git a/2025.05.02/dist/Krivoruchenko_SK/solve.h b/2025.05.02/dist/Krivoruchenko_SK/solve.h
new file mode 100644
index 0000000..84f1cb9
--- /dev/null
+++ b/2025.05.02/dist/Krivoruchenko_SK/solve.h
@@ -0,0 +1,41 @@
+#ifndef SOLVE_H
+#define SOLVE_H
+
+int t1_solve (
+		double (*f) (double), 
+		double a, double b, 
+		double eps, int m, double *x
+		);
+
+int t2_solve (
+		double (*f) (double), 
+		double (*d) (double), 
+		double x_0, double eps, 
+		int m, double *x
+		);
+
+int t3_solve (
+		double (*f) (double), 
+		double a, double b, 
+		double eps, int m, double *x
+		);
+		
+int t4_solve (
+		double (*f) (double), 
+		double a, double b, 
+		double eps, int m, double *x
+		);
+		
+int t7_solve (
+		double (*f) (double), 
+		double x_0, double eps, 
+		int m, double *x
+		);
+	
+int t8_solve (
+		double (*f) (double), 
+		double a, double b, 
+		double eps, int m, double *x
+		);
+
+#endif