diff --git a/tchervinsky.alexei/T1/datastruct.cpp b/tchervinsky.alexei/T1/datastruct.cpp
new file mode 100644
index 00000000..48b81fa3
--- /dev/null
+++ b/tchervinsky.alexei/T1/datastruct.cpp
@@ -0,0 +1,173 @@
+#include "datastruct.hpp"
+#include <iomanip>
+
+std::istream& tchervinsky::operator>>(std::istream& in, tchervinsky::Delimiter&& dest)
+{
+  std::istream::sentry sentry(in);
+  if (!sentry)
+  {
+    return in;
+  }
+  char c = '\0';
+  in >> c;
+  if (in && (c != dest.delimiter))
+  {
+    in.setstate(std::ios::failbit);
+  }
+  return in;
+}
+
+std::istream& tchervinsky::operator >> (std::istream& in, tchervinsky::DataStruct& dest)
+{
+  char c{ '\0' };
+  in >> std::skipws >> tchervinsky::Delimiter{ '(' } >> std::noskipws;
+  if (!in)
+  {
+    return in;
+  }
+  in >> std::noskipws >> tchervinsky::Delimiter{ ':' } >> std::noskipws;
+  if (!in)
+  {
+    return in;
+  }
+  bool keyfields[3]{ false };
+  for (std::size_t i = 0; i < 3; ++i)
+  {
+    std::string key;
+    in >> key;
+    if (key.size() != 4)
+    {
+      in.setstate(std::ios::failbit);
+      return in;
+    }
+    if (key.substr(0, 3) != "key")
+    {
+      in.setstate(std::ios::failbit);
+      return in;
+    }
+    c = key[3];
+    switch (c)
+    {
+      case '1':
+      {
+        in >> std::skipws >> dest.key1 >> std::noskipws
+           >> tchervinsky::Delimiter{ 'l' } >> tchervinsky::Delimiter{ 'l' }
+           >> tchervinsky::Delimiter{ ':' };
+        if (!in)
+        {
+          return in;
+        }
+        keyfields[0] = true;
+        break;
+      }
+      case '2':
+      {
+        in >> std::skipws >> tchervinsky::Delimiter{ '#' };
+        if (!in)
+        {
+          return in;
+        }
+        in >> std::noskipws >> tchervinsky::Delimiter{ 'c' };
+        if (!in)
+        {
+          return in;
+        }
+        in >> std::noskipws >> tchervinsky::Delimiter{ '(' };
+        if (!in)
+        {
+          return in;
+        }
+        double realvalue;
+        in >> std::noskipws >> realvalue;
+        if (!in)
+        {
+          in.setstate(std::ios::failbit);
+          return in;
+        }
+        dest.key2.real(realvalue);
+        double imagvalue;
+        in >> std::skipws >> imagvalue;
+        if (!in)
+        {
+          in.setstate(std::ios::failbit);
+          return in;
+        }
+        dest.key2.imag(imagvalue);
+        in >> std::noskipws >> tchervinsky::Delimiter{ ')' };
+        if (!in)
+        {
+          return in;
+        }
+        in >> std::noskipws >> tchervinsky::Delimiter{ ':' };
+        if (!in)
+        {
+          return in;
+        }
+        keyfields[1] = true;
+        break;
+      }
+      case '3':
+      {
+        std::string key3string;
+        std::getline(in, key3string, '"');
+        std::getline(in, key3string, '"');
+        if (!in)
+        {
+          in.setstate(std::ios::failbit);
+          return in;
+        }
+        dest.key3 = key3string;
+        keyfields[2] = true;
+        in >> std::noskipws >> c >> std::noskipws;
+        break;
+      }
+      default:
+      {
+        in.setstate(std::ios::failbit);
+        return in;
+      }
+    }
+  }
+  if (((keyfields[0] == keyfields[1]) == keyfields[2]) == true)
+  {
+    in >> std::noskipws >> tchervinsky::Delimiter{ ')' } >> std::noskipws;
+    if (!in)
+    {
+      return in;
+    }
+  }
+  else
+  {
+    in.setstate(std::ios::failbit);
+    return in;
+  }
+  return in;
+}
+
+std::ostream& tchervinsky::operator << (std::ostream& out, const tchervinsky::DataStruct& src)
+{
+  out << "(";
+  out << ":key1 " << src.key1 << 'l' << 'l';
+  out << ":key2 " << "#c(" << std::fixed << std::setprecision(1) << src.key2.real() << " " << src.key2.imag() << ')';
+  out << ":key3 " << '\"' << src.key3 << '\"';
+  out << ":)";
+  return out;
+}
+
+bool tchervinsky::operator < (const tchervinsky::DataStruct& a, const tchervinsky::DataStruct& b)
+{
+  if (a.key1 != b.key1)
+  {
+    return a.key1 < b.key1;
+  }
+  else if (a.key2 != b.key2)
+  {
+    double akey2mod = std::fabs(std::sqrt(std::pow(a.key2.real(), 2) + std::pow(a.key2.imag(), 2)));
+    double bkey2mod = std::fabs(std::sqrt(std::pow(b.key2.real(), 2) + std::pow(b.key2.imag(), 2)));
+    return akey2mod < bkey2mod;
+  }
+  else
+  {
+    return a.key3.size() < b.key3.size();
+  }
+}
diff --git a/tchervinsky.alexei/T1/datastruct.hpp b/tchervinsky.alexei/T1/datastruct.hpp
new file mode 100644
index 00000000..3e29f303
--- /dev/null
+++ b/tchervinsky.alexei/T1/datastruct.hpp
@@ -0,0 +1,27 @@
+#ifndef _DATA_STRUCT_HPP_
+#define _DATA_STRUCT_HPP_
+
+#include <iostream>
+#include <string>
+#include <ccomplex>
+
+namespace tchervinsky
+{
+  struct Delimiter
+  {
+    char delimiter;
+  };
+
+  struct DataStruct
+  {
+    long long key1;
+    std::complex<double> key2;
+    std::string key3;
+  };
+
+  std::istream& operator>>(std::istream& in, Delimiter&& dest);
+  std::istream& operator >> (std::istream& in, DataStruct& dest);
+  std::ostream& operator << (std::ostream& out, const DataStruct& dest);
+  bool operator < (const DataStruct& a, const DataStruct& b);
+}
+#endif
diff --git a/tchervinsky.alexei/T1/main.cpp b/tchervinsky.alexei/T1/main.cpp
new file mode 100644
index 00000000..990b3d1d
--- /dev/null
+++ b/tchervinsky.alexei/T1/main.cpp
@@ -0,0 +1,30 @@
+#include "datastruct.hpp"
+#include <iostream>
+#include <string>
+#include <iterator>
+#include <vector>
+#include <algorithm>
+#include <limits>
+
+int main()
+{
+  std::vector< tchervinsky::DataStruct > data;
+  do
+  {
+    if (!std::cin)
+    {
+      std::cin.clear();
+      std::cin.ignore(std::numeric_limits< std::streamsize >::max(), '\n');
+    }
+    std::copy(
+      std::istream_iterator< tchervinsky::DataStruct >(std::cin),
+      std::istream_iterator< tchervinsky::DataStruct >(),
+      std::back_inserter(data));
+  } while (!std::cin.eof());
+
+  std::sort(data.begin(), data.end());
+
+  std::copy(data.begin(), data.end(), std::ostream_iterator< tchervinsky::DataStruct >(std::cout, "\n"));
+
+  return 0;
+}