diff --git a/homework_01/task_01/src/main.cpp b/homework_01/task_01/src/main.cpp
index 0b3dcb2..ff7c495 100644
--- a/homework_01/task_01/src/main.cpp
+++ b/homework_01/task_01/src/main.cpp
@@ -3,8 +3,14 @@
 #include <utils.hpp>
 
 int main() {
-  for (const auto& word : SplitString("asdas das das fgag (adasd 1fas)")) {
-    std::cout << word << "\n";
+  std::string line;
+  /*std::getline(std::cin, line);
+  for (const auto& word : SplitString(line)) {
+    std::cout << word << '\n';
+  }*/
+  line="a\na\ta a";
+    for (const auto& word : SplitString(line)) {
+    std::cout << word << '\n';
   }
   return 0;
 }
diff --git a/homework_01/task_01/src/utils.cpp b/homework_01/task_01/src/utils.cpp
index a6989bd..44f52b8 100644
--- a/homework_01/task_01/src/utils.cpp
+++ b/homework_01/task_01/src/utils.cpp
@@ -1,7 +1,44 @@
 #include "utils.hpp"
 
-#include <stack>
+#include <string.h>
 
+#include <iostream>
+#include <stack>
+#include <string>
+#include <vector>
+using namespace std;
 std::vector<std::string> SplitString(const std::string& data) {
-  return {};
+  std::vector<std::string> v;
+  std::string buff = "";
+  bool flag = false;  //скобки закрыты (или их нет)
+  cout << size(data) << endl;
+  for (int i = 0; i < size(data); ++i) {
+    if (data[i] == '(') {
+      flag = true;  //скобки открыты
+    } else if (data[i] == ')') {
+      flag = false;  //скобки закрыты
+    }
+    if (((data[i] != ' ') and (data[i] != '\t')) or (flag == true)) {
+      buff += data[i];
+    }
+    cout << "Data" << i << " : " << data[i] << endl;
+    cout << "Buff: " << buff << endl;
+    if (flag == false) {
+      if ((data[i] == ' ') or (data[i] == '\t') or (i + 1 >= size(data))) {
+        if (buff != "") {
+          v.push_back(buff);
+          buff = "";
+        }
+      }
+    } else {
+      if (i + 1 >= size(data)) {
+        if (buff != "") {
+          v.push_back(buff);
+          buff = "";
+        }
+      }
+    }
+  }
+  std::cout << "Size of vector: " << v.size() << "\n";
+  return v;
 }
diff --git a/homework_01/task_02/src/main.cpp b/homework_01/task_02/src/main.cpp
index 72a6f13..f0b65d0 100644
--- a/homework_01/task_02/src/main.cpp
+++ b/homework_01/task_02/src/main.cpp
@@ -1,10 +1,22 @@
-#include <iostream>
+#include <string.h>
 
+#include <iostream>
+#include <regex>
+#include <stack>
 #include <utils.hpp>
-
+using namespace std;
 int main() {
-  std::string data;
-  std::getline(std::cin, data);
-  std::cout << Calculate(data);
+  string input;
+  int res;
+  cout << "REZULTAT" << Calculate("5*9-8") << endl;
+  while (7) {
+    std::cout << "Vvedite, poghaluista, stroku: " << std::endl;
+    getline(cin, input);
+    if (input == "quit") {
+      break;
+    }
+    cout << Parce(input) << endl;
+    cout << "Double: " << IsDouble(input) << endl;
+  }
   return 0;
 }
diff --git a/homework_01/task_02/src/utils.cpp b/homework_01/task_02/src/utils.cpp
index ebc7ffc..00b524e 100644
--- a/homework_01/task_02/src/utils.cpp
+++ b/homework_01/task_02/src/utils.cpp
@@ -1,7 +1,190 @@
 #include "utils.hpp"
 
+#include <string.h>
+
+#include <iostream>
+#include <regex>
 #include <stack>
+#include <string>
+#include <vector>
+using namespace std;
+
+std::vector<std::string> SplitString(const std::string& data) {
+  std::vector<std::string> v;
+  std::string buff = "";
+  bool flag = false;
+  for (int i = 0; i < size(data); ++i) {
+    if (data[i] == '(') {
+      flag = true;
+    } else if (data[i] == ')') {
+      flag = false;
+    }
+    if (((data[i] != ' ') and (data[i] != '\t') and (data[i] != '+') and
+         (data[i] != '-') and (data[i] != '*') and (data[i] != '/')) or
+        (flag == true)) {
+      buff += data[i];
+    }
+    if (flag == false) {
+      if ((data[i] == ' ') or (data[i] == '\t') or (data[i] == '+') or
+          (data[i] == '-') or (data[i] == '*') or (data[i] == '/') or
+          (i + 1 >= size(data))) {
+        if (buff != "") {
+          v.push_back(buff);
+          buff = "";
+          if ((data[i] == '+') or (data[i] == '-') or (data[i] == '*') or
+              (data[i] == '/')) {
+            buff += data[i];
+            v.push_back(buff);
+            buff = "";
+          }
+        }
+      }
+    } else {
+      if (i + 1 >= size(data)) {
+        if (buff != "") {
+          v.push_back(buff);
+          buff = "";
+        }
+      }
+    }
+  }
+  return v;
+}
+
+bool IsInt_bad_version(const std::string& str) {
+  int a = 1;
+  bool flag = true;
+  if (str.empty()) flag = false;
+  for (size_t i = 1; i < str.size(); ++i) {
+    if ((str[i] >= '0') && (str[i] <= '9'))
+      a = 1;
+    else
+      flag = false;
+
+    if ((!std::isdigit(str[0])) && (str[0] != '-') && (str[0] != '+')) {
+      flag = false;
+    }
+  }
+  return flag;
+}
+
+bool IsInt(const std::string& str) {
+  static std::regex r(R"([+-]?\d+)");  // проверяем число ли это в системе
+                                       // regular expressions (regex)
+  return std::regex_match(str, r);
+}
+
+bool IsDouble(const std::string& str) {
+  static std::regex r(
+      R"([+-]?(\d*\.)?\d+([Ee][+-]?\d+)?)");  // проверяем double число ли это в
+                                              // системе regular expressions
+                                              // (regex)
+  return std::regex_match(str, r);
+}
+
+string Parce(const std::string& input) {
+  bool Int_test = IsInt(input);
+  if (Int_test) {
+    return "true";
+  std:
+    cout << std::stod(input) << std::endl;
+  } else
+    return "false";
+}
 
 int Calculate(const std::string& data) {
-  return 0;
+  int i = 0;
+  int buff_int = 0;
+  std::string znak;
+  int rez = 0;
+  // std::string buff_str;
+  vector<int> chisla;
+  vector<string> r = SplitString(data);
+  for (int i = 0; i < r.size(); ++i) {
+    std::cout << i << "element: " << r[i] << '\n';
+  }
+  for (i = 0; i < data.size(); ++i) {
+    if ((data[i] >= '0') && (data[i] <= '9')) {
+    }
+    for (i = 0; i < r.size(); ++i) {
+      if ((r[i] != "+") and (r[i] != "-") and (r[i] != "*") and (r[i] != "/")) {
+        chisla.push_back(stoi(r[i]));
+      } else {
+        znak = r[i];
+      }
+    }
+    if (!chisla.empty())
+      rez = chisla[0];
+    else {
+      cout << "Error" << endl;
+      rez = -1;
+    }
+    cout << znak << endl;
+    if (!chisla.empty()) {
+      for (i = 1; i < chisla.size(); ++i) {
+        if (znak == "+") {
+          rez += chisla[i];
+        }
+        if (znak == "-") {
+          rez -= chisla[i];
+        }
+        if (znak == "*") {
+          rez *= chisla[i];
+        }
+        if (znak == "/") {
+          rez /= chisla[i];
+        }
+      }
+    }
+    return rez;
+  }
+}
+
+int CalculatePrefix(const std::string& data) {
+  cout << "Not Ready" << endl;
+  int i = 0;
+  int buff_int = 0;
+  std::string znak;
+  int rez = 0;
+  // std::string buff_str;
+  vector<int> chisla;
+  vector<string> r = SplitString(data);
+  for (int i = 0; i < r.size(); ++i) {
+    std::cout << i << "element: " << r[i] << '\n';
+  }
+  for (i = 0; i < data.size(); ++i) {
+    if ((data[i] >= '0') && (data[i] <= '9')) {
+    }
+    for (i = 0; i < r.size(); ++i) {
+      if ((r[i] != "+") and (r[i] != "-") and (r[i] != "*") and (r[i] != "/")) {
+        chisla.push_back(stoi(r[i]));
+      } else {
+        znak = r[i];
+      }
+    }
+    if (!chisla.empty())
+      rez = chisla[0];
+    else {
+      cout << "Error" << endl;
+      rez = -1;
+    }
+    cout << znak << endl;
+    if (!chisla.empty()) {
+      for (i = 1; i < chisla.size(); ++i) {
+        if (znak == "+") {
+          rez += chisla[i];
+        }
+        if (znak == "-") {
+          rez -= chisla[i];
+        }
+        if (znak == "*") {
+          rez *= chisla[i];
+        }
+        if (znak == "/") {
+          rez /= chisla[i];
+        }
+      }
+    }
+    return rez;
+  }
 }
diff --git a/homework_01/task_02/src/utils.hpp b/homework_01/task_02/src/utils.hpp
index f1bceeb..711028c 100644
--- a/homework_01/task_02/src/utils.hpp
+++ b/homework_01/task_02/src/utils.hpp
@@ -5,3 +5,8 @@
 #include <vector>
 
 int Calculate(const std::string& data);
+std::vector<std::string> SplitString(const std::string& data);
+bool IsInt_bad_version(const std::string& str);
+bool IsInt(const std::string& str);
+bool IsDouble(const std::string& str);
+std::string Parce(const std::string& input);
\ No newline at end of file