diff --git a/2025.04.04/asymptotics_test/asymptotics.xlsx b/2025.04.04/asymptotics_test/asymptotics.xlsx
index 48f80d6..8ab2793 100644
Binary files a/2025.04.04/asymptotics_test/asymptotics.xlsx and b/2025.04.04/asymptotics_test/asymptotics.xlsx differ
diff --git a/2025.04.18/dist/Ulyanov_MT/Makefile b/2025.04.18/dist/Ulyanov_MT/Makefile
new file mode 100644
index 0000000..f90ef27
--- /dev/null
+++ b/2025.04.18/dist/Ulyanov_MT/Makefile
@@ -0,0 +1,36 @@
+FLAGS = -mfpmath=sse -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 -Wmaybe-uninitialized -O3
+all: a01.out a02.out a03.out a04.out a05.out a06.out a07.out
+a01.out: a01.o array.o functions.o
+	gcc a01.o array.o functions.o -lm -o a01.out
+a02.out: a02.o array.o functions.o
+	gcc a02.o array.o functions.o -lm -o a02.out
+a03.out: a03.o array.o functions.o
+	gcc a03.o array.o functions.o -lm -o a03.out
+a04.out: a04.o array.o functions.o
+	gcc a04.o array.o functions.o -lm -o a04.out
+a05.out: a05.o array.o functions.o
+	gcc a05.o array.o functions.o -lm -o a05.out
+a06.out: a06.o array.o functions.o
+	gcc a06.o array.o functions.o -lm -o a06.out
+a07.out: a07.o array.o functions.o
+	gcc a07.o array.o functions.o -lm -o a07.out
+array.o:
+	gcc -c $(FLAGS) -o array.o array.c
+functions.o:
+	gcc -c $(FLAGS) -o functions.o functions.c
+a01.o:
+	gcc -c $(FLAGS) -o a01.o task01.c
+a02.o:
+	gcc -c $(FLAGS) -o a02.o task02.c
+a03.o:
+	gcc -c $(FLAGS) -o a03.o task03.c
+a04.o:
+	gcc -c $(FLAGS) -o a04.o task04.c
+a05.o:
+	gcc -c $(FLAGS) -o a05.o task05.c
+a06.o:
+	gcc -c $(FLAGS) -o a06.o task06.c
+a07.o:
+	gcc -c $(FLAGS) -o a07.o task07.c
+clean:
+	rm -f *.o *.out
diff --git a/2025.04.18/dist/Ulyanov_MT/array.c b/2025.04.18/dist/Ulyanov_MT/array.c
new file mode 100644
index 0000000..64e33f0
--- /dev/null
+++ b/2025.04.18/dist/Ulyanov_MT/array.c
@@ -0,0 +1,98 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include "io_status.h"
+#include "array.h"
+#include "functions.h"
+
+io_status read_matrix(double* a, int n, int m, const char* name)
+  {
+  int i, j;
+  FILE* fp;
+  if (!(fp = fopen(name, "r")))
+      return ERROR_OPEN;
+  for (i = 0; i < n; i++)
+      {
+      for (j = 0; j < m; j++)
+          {
+          if (fscanf(fp, "%lf", a + i * m + j) != 1)
+              {
+              fclose(fp);
+              return ERROR_READ;
+              }
+          }
+      }
+  fclose(fp);
+  return SUCCESS;
+  }
+  
+io_status read_function(double* x, double* y, int n, const char* name)
+  {
+  int i;
+  FILE* fp;
+  if (!(fp = fopen(name, "r")))
+      return ERROR_OPEN;
+  for (i = 0; i < n; i++)
+      {
+      if ((fscanf(fp, "%lf", x + i) != 1) || (fscanf(fp, "%lf", y + i) != 1))
+          {
+          fclose(fp);
+          return ERROR_READ;
+          }
+      }
+  fclose(fp);
+  return SUCCESS;
+  }
+  
+io_status read_func_diff(double* x, double* yd, int n, const char* name)
+  {
+  int i;
+  FILE* fp;
+  if (!(fp = fopen(name, "r")))
+      return ERROR_OPEN;
+  for (i = 0; i < n; i++)
+      {
+      if ((fscanf(fp, "%lf", x + i) != 1) || (fscanf(fp, "%lf", yd + 2 * i) != 1) || (fscanf(fp, "%lf", yd + 2 * i + 1) != 1))
+          {
+          fclose(fp);
+          return ERROR_READ;
+          }
+      }
+  fclose(fp);
+  return SUCCESS;
+  }
+  
+void print_matrix(const double* a, int n, int m, int p)
+  {
+  int np = (n > p ? p : n);
+  int mp = (m > p ? p : m);
+  int i, j;
+  for (i = 0; i < np; i++)
+      {
+      for (j = 0; j < mp; j++)
+          printf(" %10.3e", a[i * m + j]);
+      printf("\n");
+      }
+  }
+  
+void init_matrix(double* a, int n, int m, int k)
+  {
+  int i, j;
+  for (i = 0; i < n; i++)
+      {
+      for (j = 0; j < m; j++)
+          a[i * m + j] = f(k, n, m, i+1, j+1);
+      }
+  }
+  
+double f(int k, int n, int m, int i, int j)
+  {
+  switch (k)
+      {
+      case 1: return (n >= m ? n : m) - (i >= j ? i : j) + 1;
+      case 2: return (i >= j ? i : j);
+      case 3: return (i - j >= 0 ? i - j : j - i);
+      case 4: return 1./(i + j - 1);
+      }
+  return -1e308;
+  }
diff --git a/2025.04.18/dist/Ulyanov_MT/array.h b/2025.04.18/dist/Ulyanov_MT/array.h
new file mode 100644
index 0000000..e64dc5a
--- /dev/null
+++ b/2025.04.18/dist/Ulyanov_MT/array.h
@@ -0,0 +1,6 @@
+io_status read_matrix(double*, int, int, const char*);
+io_status read_function(double*, double*, int, const char*);
+io_status read_func_diff(double*, double*, int, const char*);
+void print_matrix(const double*, int, int, int);
+void init_matrix(double*, int, int, int);
+double f(int, int, int, int, int);
diff --git a/2025.04.18/dist/Ulyanov_MT/functions.c b/2025.04.18/dist/Ulyanov_MT/functions.c
new file mode 100644
index 0000000..0eef828
--- /dev/null
+++ b/2025.04.18/dist/Ulyanov_MT/functions.c
@@ -0,0 +1,8 @@
+#include <math.h>
+#include "functions.h"
+
+int equal(double a, double b)
+  {
+  if (fabs(a - b) <= EPS * fmax(fabs(a), fabs(b))) return 1;
+  return 0;
+  }
diff --git a/2025.04.18/dist/Ulyanov_MT/functions.h b/2025.04.18/dist/Ulyanov_MT/functions.h
new file mode 100644
index 0000000..25355d0
--- /dev/null
+++ b/2025.04.18/dist/Ulyanov_MT/functions.h
@@ -0,0 +1,3 @@
+#define EPS 1e-16
+
+int equal(double, double);
diff --git a/2025.04.18/dist/Ulyanov_MT/io_status.h b/2025.04.18/dist/Ulyanov_MT/io_status.h
new file mode 100644
index 0000000..9ade840
--- /dev/null
+++ b/2025.04.18/dist/Ulyanov_MT/io_status.h
@@ -0,0 +1,7 @@
+typedef enum io_status_
+  {
+  SUCCESS,
+  ERROR_OPEN,
+  ERROR_READ,
+  ERROR_FUNCTION,
+  } io_status;
diff --git a/2025.04.18/dist/Ulyanov_MT/task01.c b/2025.04.18/dist/Ulyanov_MT/task01.c
new file mode 100644
index 0000000..78f9fee
--- /dev/null
+++ b/2025.04.18/dist/Ulyanov_MT/task01.c
@@ -0,0 +1,95 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <math.h>
+#include "io_status.h"
+#include "array.h"
+#include "functions.h"
+
+io_status solve1(double*, double*, double, int, double*);
+
+int main(int argc, char* argv[])
+  {
+  int task = 1;
+  io_status ret;
+  double* x;
+  double* y;
+  int n;
+  double x0;
+  char* name = 0;
+  double res;
+  double t;
+  if (!((argc == 4) && sscanf(argv[1], "%le", &x0) == 1 && sscanf(argv[2], "%d", &n) == 1))
+      {
+      printf("Usage: %s x0 n file\n", argv[0]);
+      return 1;
+      }
+  name = argv[3];
+  x = (double*) malloc(n * sizeof(double));
+  y = (double*) malloc(n * sizeof(double));
+  if ((!x) || (!y))
+      {
+      printf("Not enough memory\n");
+      if (x) free(x);
+      if (y) free(y);
+      return 2;
+      }
+  ret = read_function(x, y, n, name);
+  if (ret != SUCCESS)
+      {
+      switch(ret)
+          {
+          case ERROR_OPEN:
+              printf("Can not open file %s\n", name);
+              break;
+          case ERROR_READ:
+              printf("Can not read file %s\n", name);
+              break;
+          default:
+              printf("UNknown error in file %s\n", name);
+          }
+      free(x);
+      free(y);
+      return 3;
+      }
+  t = clock();
+  ret = solve1(x, y, x0, n, &res);
+  t = (clock() - t) / CLOCKS_PER_SEC;
+  if (ret != SUCCESS)
+      {
+      printf("Similar points in file %s\n", name);
+      free(x);
+      free(y);
+      return 4;
+      }
+  printf ("%s : Task = %d Result = %e Elapsed = %.2f\n", argv[0], task, res, t);
+  free(x);
+  free(y);
+  return 0;
+  }
+    
+io_status solve1(double* x, double* y, double x0, int n, double* res)
+  {
+  int i, j;
+  double el_i, el_j, mult, sum = 0;
+  for (i = 0; i < n; i++)
+      {
+      mult = 1;
+      el_i = x[i];
+      for (j = 0; j < i; j++) 
+          {
+          el_j =x[j];
+          if (equal(el_i, el_j)) return ERROR_FUNCTION;
+          mult *= (x0 - el_j) / (el_i - el_j);
+          }
+      for (j = i + 1; j < n; j++) 
+          {
+          el_j =x[j];
+          if (equal(el_i, el_j)) return ERROR_FUNCTION;
+          mult *= (x0 - el_j) / (el_i - el_j);
+          }
+      sum += y[i] * mult;
+      }
+  *res = sum;
+  return SUCCESS;
+  }
diff --git a/2025.04.18/dist/Ulyanov_MT/task02.c b/2025.04.18/dist/Ulyanov_MT/task02.c
new file mode 100644
index 0000000..a5b006f
--- /dev/null
+++ b/2025.04.18/dist/Ulyanov_MT/task02.c
@@ -0,0 +1,91 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <math.h>
+#include "io_status.h"
+#include "array.h"
+#include "functions.h"
+
+io_status solve2(double*, double*, double, int, double*);
+
+int main(int argc, char* argv[])
+  {
+  int task = 2;
+  io_status ret;
+  double* x;
+  double* y;
+  int n;
+  double x0;
+  char* name = 0;
+  double res;
+  double t;
+  if (!((argc == 4) && sscanf(argv[1], "%le", &x0) == 1 && sscanf(argv[2], "%d", &n) == 1))
+      {
+      printf("Usage: %s x0 n file\n", argv[0]);
+      return 1;
+      }
+  name = argv[3];
+  x = (double*) malloc(n * sizeof(double));
+  y = (double*) malloc(n * sizeof(double));
+  if ((!x) || (!y))
+      {
+      printf("Not enough memory\n");
+      if (x) free(x);
+      if (y) free(y);
+      return 2;
+      }
+  ret = read_function(x, y, n, name);
+  if (ret != SUCCESS)
+      {
+      switch(ret)
+          {
+          case ERROR_OPEN:
+              printf("Can not open file %s\n", name);
+              break;
+          case ERROR_READ:
+              printf("Can not read file %s\n", name);
+              break;
+          default:
+              printf("UNknown error in file %s\n", name);
+          }
+      free(x);
+      free(y);
+      return 3;
+      }
+  t = clock();
+  ret = solve2(x, y, x0, n, &res);
+  t = (clock() - t) / CLOCKS_PER_SEC;
+  if (ret != SUCCESS)
+      {
+      printf("Similar points in file %s\n", name);
+      free(x);
+      free(y);
+      return 4;
+      }
+  printf ("%s : Task = %d Result = %e Elapsed = %.2f\n", argv[0], task, res, t);
+  free(x);
+  free(y);
+  return 0;
+  }
+    
+io_status solve2(double* x, double* y, double x0, int n, double* res)
+  {
+  int i, j;
+  double el_n, el_prev, sum = 0;
+  for (j = 0; j < n; j++)
+      {
+      for (i = n - 1; i > j; i--)
+          {
+          el_n = x[i];
+          el_prev = x[i - j - 1];
+          if (equal(el_n, el_prev)) return ERROR_FUNCTION;
+          y[i] = (y[i] - y[i - 1]) / (el_n - el_prev);
+          }
+      }
+  for (i = n - 1; i >= 0; i--)
+      {
+      sum = y[i] + (x0 - x[i]) * sum;
+      }
+  *res = sum;
+  return SUCCESS;
+  }
diff --git a/2025.04.18/dist/Ulyanov_MT/task03.c b/2025.04.18/dist/Ulyanov_MT/task03.c
new file mode 100644
index 0000000..7ad7006
--- /dev/null
+++ b/2025.04.18/dist/Ulyanov_MT/task03.c
@@ -0,0 +1,87 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <math.h>
+#include "io_status.h"
+#include "array.h"
+#include "functions.h"
+
+io_status solve3(double*, double*, double, int, double*);
+
+int main(int argc, char* argv[])
+  {
+  int task = 3;
+  io_status ret;
+  double* x;
+  double* y;
+  int n;
+  double x0;
+  char* name = 0;
+  double res;
+  double t;
+  if (!((argc == 4) && sscanf(argv[1], "%le", &x0) == 1 && sscanf(argv[2], "%d", &n) == 1))
+      {
+      printf("Usage: %s x0 n file\n", argv[0]);
+      return 1;
+      }
+  name = argv[3];
+  x = (double*) malloc(n * sizeof(double));
+  y = (double*) malloc(n * sizeof(double));
+  if ((!x) || (!y))
+      {
+      printf("Not enough memory\n");
+      if (x) free(x);
+      if (y) free(y);
+      return 2;
+      }
+  ret = read_function(x, y, n, name);
+  if (ret != SUCCESS)
+      {
+      switch(ret)
+          {
+          case ERROR_OPEN:
+              printf("Can not open file %s\n", name);
+              break;
+          case ERROR_READ:
+              printf("Can not read file %s\n", name);
+              break;
+          default:
+              printf("UNknown error in file %s\n", name);
+          }
+      free(x);
+      free(y);
+      return 3;
+      }
+  t = clock();
+  ret = solve3(x, y, x0, n, &res);
+  t = (clock() - t) / CLOCKS_PER_SEC;
+  if (ret != SUCCESS)
+      {
+      printf("Similar points in file %s\n", name);
+      free(x);
+      free(y);
+      return 4;
+      }
+  printf ("%s : Task = %d Result = %e Elapsed = %.2f\n", argv[0], task, res, t);
+  free(x);
+  free(y);
+  return 0;
+  }
+    
+io_status solve3(double* x, double* y, double x0, int n, double* res)
+  {
+  int i, j;
+  double el_n, el_prev;
+  for (j = 0; j < n; j++)
+      {
+      for (i = n - 1; i > j; i--)
+          {
+          el_n = x[i];
+          el_prev = x[i - j - 1];
+          if (equal(el_n, el_prev)) return ERROR_FUNCTION;
+          y[i] = (y[i] * (x0 - el_prev) - y[i - 1] * (x0 - el_n)) / (el_n - el_prev);
+          }
+      }
+  *res = y[n - 1];
+  return SUCCESS;
+  }
diff --git a/2025.04.18/dist/Ulyanov_MT/task04.c b/2025.04.18/dist/Ulyanov_MT/task04.c
new file mode 100644
index 0000000..be44ec8
--- /dev/null
+++ b/2025.04.18/dist/Ulyanov_MT/task04.c
@@ -0,0 +1,98 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <math.h>
+#include "io_status.h"
+#include "array.h"
+#include "functions.h"
+
+io_status solve4(double*, double*, double, int, double*);
+
+int main(int argc, char* argv[])
+  {
+  int task = 4;
+  io_status ret;
+  double* x;
+  double* yd;
+  int n;
+  double x0;
+  char* name = 0;
+  double res;
+  double t;
+  if (!((argc == 4) && sscanf(argv[1], "%le", &x0) == 1 && sscanf(argv[2], "%d", &n) == 1))
+      {
+      printf("Usage: %s x0 n file\n", argv[0]);
+      return 1;
+      }
+  name = argv[3];
+  x = (double*) malloc(n * sizeof(double));
+  yd = (double*) malloc(2 * n * sizeof(double));
+  if ((!x) || (!yd))
+      {
+      printf("Not enough memory\n");
+      if (x) free(x);
+      if (yd) free(yd);
+      return 2;
+      }
+  ret = read_func_diff(x, yd, n, name);
+  if (ret != SUCCESS)
+      {
+      switch(ret)
+          {
+          case ERROR_OPEN:
+              printf("Can not open file %s\n", name);
+              break;
+          case ERROR_READ:
+              printf("Can not read file %s\n", name);
+              break;
+          default:
+              printf("UNknown error in file %s\n", name);
+          }
+      free(x);
+      free(yd);
+      return 3;
+      }
+  t = clock();
+  ret = solve4(x, yd, x0, n, &res);
+  t = (clock() - t) / CLOCKS_PER_SEC;
+  if (ret != SUCCESS)
+      {
+      printf("Similar points in file %s\n", name);
+      free(x);
+      free(yd);
+      return 4;
+      }
+  printf ("%s : Task = %d Result = %e Elapsed = %.2f\n", argv[0], task, res, t);
+  free(x);
+  free(yd);
+  return 0;
+  }
+    
+io_status solve4(double* x, double* yd, double x0, int n, double* res)
+  {
+  int i, j;
+  double el_n, el_prev, sum = 0;
+  for (i = n - 1; i > 0; i--)
+      {
+      el_n = x[i];
+      el_prev = x[i - 1];
+      if (equal(el_n, el_prev)) return ERROR_FUNCTION;
+      yd[2 * i] = (yd[2 * i] - yd[2 * i - 2]) / (el_n - el_prev);
+      }
+  for (j = 1; j < 2 * n; j++)
+      {
+      for (i = 2 * n - 1; i > j; i--)
+          {
+          el_n = x[i / 2];
+          el_prev = x[(i - j - 1) / 2];
+          if (equal(el_n, el_prev)) return ERROR_FUNCTION;
+          yd[i] = (yd[i] - yd[i - 1]) / (el_n - el_prev);
+          }
+      }
+  for (i = 2 * n - 1; i >= 0; i--)
+      {
+      sum = yd[i] + (x0 - x[i / 2]) * sum;
+      }
+  *res = sum;
+  return SUCCESS;
+  }
diff --git a/2025.04.18/dist/Ulyanov_MT/task05.c b/2025.04.18/dist/Ulyanov_MT/task05.c
new file mode 100644
index 0000000..cbf26b7
--- /dev/null
+++ b/2025.04.18/dist/Ulyanov_MT/task05.c
@@ -0,0 +1,80 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <math.h>
+#include "io_status.h"
+#include "array.h"
+#include "functions.h"
+
+double solve5(double, double);
+
+int main(int argc, char* argv[])
+  {
+  int task = 5;
+  double x, eps;
+  double res;
+  double diff;
+  double t;
+  if (!((argc == 3) && sscanf(argv[1], "%le", &x) == 1 && sscanf(argv[2], "%le", &eps) == 1))
+      {
+      printf("Usage: %s x0 eps\n", argv[0]);
+      return 1;
+      }
+  t = clock();
+  res = solve5(x, eps);
+  t = (clock() - t) / CLOCKS_PER_SEC;
+  diff = fabs(res - sin(x));
+  printf ("%s : Task = %d Result = %e Residual = %e Elapsed = %.2f\n", argv[0], task, res, diff, t);
+  return 0;
+  }
+  
+double solve5(double x, double eps)
+    {
+    int i = 1, sign = 1, flag = 0;
+    double el, res = 0;
+    x = fmod(x, 2 * M_PI);
+    if (x > M_PI)
+        {
+        x = x - M_PI;
+        sign *= -1;
+        }
+    if (x < -M_PI)
+        {
+        x = x + M_PI;
+        sign *= -1;
+        }
+    if (x > M_PI / 2) x = M_PI - x;
+    if (x < -M_PI / 2) x = -M_PI - x;
+    if (x > M_PI / 4)
+        {
+        x = M_PI / 2 - x;
+        flag = 1;
+        }
+    if (x < -M_PI / 4)
+        {
+        x = -M_PI / 2 - x;
+        sign *= -1;
+        flag = 1;
+        }
+    if (flag == 0)
+        {
+        el = x;
+        while (fabs(el) >= eps)
+            {
+            res += el;
+            el *= -1 * ((x * x) / (4 * i * i + 2 * i));
+            i++;
+            }
+        }
+    else
+        {
+        el = 1;
+        while (fabs(el) >= eps)
+            {
+            res += el;
+            el *= -1 * ((x * x) / (4 * i * i - 2 * i));
+            i++;
+            }
+        }
+    return sign * res;
+    }
diff --git a/2025.04.18/dist/Ulyanov_MT/task06.c b/2025.04.18/dist/Ulyanov_MT/task06.c
new file mode 100644
index 0000000..6f39bda
--- /dev/null
+++ b/2025.04.18/dist/Ulyanov_MT/task06.c
@@ -0,0 +1,88 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <math.h>
+#include "io_status.h"
+#include "array.h"
+#include "functions.h"
+
+double solve6(double, double);
+
+int main(int argc, char* argv[])
+  {
+  int task = 6;
+  double x, eps;
+  double res;
+  double diff;
+  double t;
+  if (!((argc == 3) && sscanf(argv[1], "%le", &x) == 1 && sscanf(argv[2], "%le", &eps) == 1))
+      {
+      printf("Usage: %s x0 eps\n", argv[0]);
+      return 1;
+      }
+  t = clock();
+  res = solve6(x, eps);
+  t = (clock() - t) / CLOCKS_PER_SEC;
+  diff = fabs(res - cos(x));
+  printf ("%s : Task = %d Result = %e Residual = %e Elapsed = %.2f\n", argv[0], task, res, diff, t);
+  return 0;
+  }
+  
+double solve6(double x, double eps)
+  {
+  int i = 1, sign = 1, flag = 1;
+  double el, res = 0;
+  x = fmod(x, 2 * M_PI);
+  if (x > M_PI)
+      {
+      x = x - M_PI;
+      sign *= -1;
+      }
+  if (x < -M_PI)
+      {
+      x = x + M_PI;
+      sign *= -1;
+      }
+  if (x > M_PI / 2)
+      {
+      x = M_PI - x;
+      sign *= -1;
+      }
+  if (x < -M_PI / 2) 
+      {
+      x = -M_PI - x;
+      sign *= -1;
+      }
+  if (x > M_PI / 4)
+      {
+      x = M_PI / 2 - x;
+      flag = 0;
+      }
+  if (x < -M_PI / 4)
+      {
+      x = -M_PI / 2 - x;
+      sign *= -1;
+      flag = 0;
+      }
+  if (flag == 1)
+      {
+      el = 1;
+      while (fabs(el) >= eps)
+          {
+          res += el;
+          el *= -1 * ((x * x) / (4 * i * i - 2 * i));
+          i++;
+          }
+      }
+  else
+      {
+      el = x;
+      while (fabs(el) >= eps)
+          {
+          res += el;
+          el *= -1 * ((x * x) / (4 * i * i + 2 * i));
+          i++;
+          }
+      }
+  return sign * res;
+  }
diff --git a/2025.04.18/dist/Ulyanov_MT/task07.c b/2025.04.18/dist/Ulyanov_MT/task07.c
new file mode 100644
index 0000000..a5e7578
--- /dev/null
+++ b/2025.04.18/dist/Ulyanov_MT/task07.c
@@ -0,0 +1,48 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <math.h>
+#include "io_status.h"
+#include "array.h"
+#include "functions.h"
+
+double solve7(double, double);
+
+int main(int argc, char* argv[])
+  {
+  int task = 7;
+  double x, eps;
+  double res;
+  double diff;
+  double t;
+  if (!((argc == 3) && sscanf(argv[1], "%le", &x) == 1 && sscanf(argv[2], "%le", &eps) == 1))
+      {
+      printf("Usage: %s x0 eps\n", argv[0]);
+      return 1;
+      }
+  t = clock();
+  res = solve7(x, eps);
+  t = (clock() - t) / CLOCKS_PER_SEC;
+  diff = fabs(res - exp(x));
+  printf ("%s : Task = %d Result = %e Residual = %e Elapsed = %.2f\n", argv[0], task, res, diff, t);
+  return 0;
+  }
+  
+double solve7(double x, double eps)
+  {
+  int i = 1, intg;
+  double mult = 1, el = 1, res = 0;
+  intg = floor(x);
+  x = x - intg;
+  while (fabs(el) >= eps)
+      {
+      res += el;
+      el *= x / i;
+      i++;
+      }
+  for (i = 0; i < intg; i++)
+      {
+      mult *= M_E;
+      }
+  return mult * res;
+  }