diff --git a/sem2/OvsyannikovaVA/MINI_3/input.txt b/sem2/OvsyannikovaVA/MINI_3/input.txt
new file mode 100644
index 00000000..3f95ed8e
--- /dev/null
+++ b/sem2/OvsyannikovaVA/MINI_3/input.txt
@@ -0,0 +1,6 @@
+Hello world
+C++ programming is fun
+Lambda expressions
+STL algorithms
+Short
+A very long string just for testing purposes
\ No newline at end of file
diff --git a/sem2/OvsyannikovaVA/MINI_3/main.cpp b/sem2/OvsyannikovaVA/MINI_3/main.cpp
new file mode 100644
index 00000000..7503787b
--- /dev/null
+++ b/sem2/OvsyannikovaVA/MINI_3/main.cpp
@@ -0,0 +1,103 @@
+#include <algorithm>
+#include <fstream>
+#include <iomanip>
+#include <iostream>
+#include <string>
+#include <vector>
+
+int main() {
+  char* locale = setlocale(LC_ALL, "");
+
+  std::ifstream file("input.txt");
+  std::vector<std::string> lines;
+  std::string line;
+
+  if (file.is_open()) {
+    while (std::getline(file, line)) {
+      lines.push_back(line);
+    }
+    file.close();
+  }
+
+  int porog;
+
+  std::cout << "Ñòðîêè, äëèíà êîòîðûõ ìåíüøå ïîðîãà, óäàëÿòñÿ. Ââåäèòå ïîðîã: ";
+  std::cin >> porog;
+
+  auto f1 = [porog](std::string s) { return s.length() < porog; };
+  std::vector<std::string> poroglines = lines;
+  poroglines.erase(std::remove_if(poroglines.begin(), poroglines.end(), f1),
+                   poroglines.end());
+
+  auto f2 = [](std::string s) {
+    std::replace(s.begin(), s.end(), ' ', '_');
+    return s;
+  };
+  std::vector<std::string> lineswospace;
+  for (auto line : lines) {
+    lineswospace.push_back(f2(line));
+  }
+
+  std::string word;
+  std::cout << "Ââåäèòå ñëîâî äëÿ ïîèñêà: ";
+  std::cin >> word;
+
+  auto f3 = [&word](std::string str) -> bool {
+    return str.find(word) != std::string::npos;
+  };
+
+  std::vector<std::string> found;
+  for (auto line : lines) {
+    if (f3(line)) {
+      found.push_back(line);
+    }
+  }
+
+  auto f4 = [](char c) { return c != '_'; };
+  int allchars = 0;
+
+  for (auto str : lines) {
+    allchars += std::count_if(str.begin(), str.end(), f4);
+  }
+
+  std::vector<int> lengthstr;
+  auto f5 = [](std::string str) -> int { return str.length(); };
+
+  for (auto str : lines) {
+    lengthstr.push_back(f5(str));
+  }
+
+  // ââîä
+  std::ofstream file2("output.txt");
+
+  file2 << "ÈÑÕÎÄÍÛÉ ÂÅÊÒÎÐ ÑÒÐÎÊ:\n";
+  for (int i = 0; i < lines.size(); ++i) {
+    file2 << "  " << std::setw(4) << (i + 1) << ". \"" << lines[i] << "\"\n";
+  }
+
+  file2 << "\nÂÅÊÒÎÐ ÑÒÐÎÊ ÏÎÑËÅ ÓÄÀËÅÍÈß ÊÎÐÎÒÊÈÕ ÑÒÐÎÊ:\n";
+  file2 << " Ïîðîã: " << porog << " ñèìâîëîâ\n";
+  for (int i = 0; i < poroglines.size(); ++i) {
+    file2 << "  " << std::setw(4) << (i + 1) << ". \"" << poroglines[i]
+          << "\" (" << poroglines[i].length() << ")\n";
+  }
+
+  file2 << "\nÂÅÊÒÎÐ ÑÒÐÎÊ ÏÎÑËÅ ÇÀÌÅÍÛ ÏÐÎÁÅËÎÂ ÍÀ \"_\":\n";
+  for (int i = 0; i < lineswospace.size(); ++i) {
+    file2 << "  " << std::setw(4) << (i + 1) << ". \"" << lineswospace[i]
+          << "\"\n";
+  }
+
+  file2 << "\nÐÅÇÓËÜÒÀÒ ÏÎÈÑÊÀ ÇÀÄÀÍÍÎÃÎ ÑËÎÂÀ:\n";
+  file2 << "Èñêîìîå ñëîâî: " << word << "\n";
+  for (int i = 0; i < found.size(); ++i) {
+    file2 << "     " << (i + 1) << ". " << found[i] << "\n";
+  }
+
+  file2 << "\nÎÁÙÅÅ ÊÎËÈ×ÅÑÒÂÎ ÑÈÌÂÎËΠÁÅÇ \"_\": " << allchars << "\n";
+
+  file2 << "\nÂÅÊÒÎÐ ÄËÈÍ ÑÒÐÎÊ:\n";
+  for (int i = 0; i < lengthstr.size(); ++i) {
+    file2 << "  " << std::setw(4) << (i + 1) << ". " << lengthstr[i] << "\n";
+  }
+}
diff --git a/sem2/OvsyannikovaVA/MINI_3/output.txt b/sem2/OvsyannikovaVA/MINI_3/output.txt
new file mode 100644
index 00000000..9099b46e
--- /dev/null
+++ b/sem2/OvsyannikovaVA/MINI_3/output.txt
@@ -0,0 +1,34 @@
+ÈÑÕÎÄÍÛÉ ÂÅÊÒÎÐ ÑÒÐÎÊ:
+     1. "Hello world"
+     2. "C++ programming is fun"
+     3. "Lambda expressions"
+     4. "STL algorithms"
+     5. "Short"
+     6. "A very long string just for testing purposes"
+
+ÂÅÊÒÎÐ ÑÒÐÎÊ ÏÎÑËÅ ÓÄÀËÅÍÈß ÊÎÐÎÒÊÈÕ ÑÒÐÎÊ:
+ Ïîðîã: 20 ñèìâîëîâ
+     1. "C++ programming is fun" (22)
+     2. "A very long string just for testing purposes" (44)
+
+ÂÅÊÒÎÐ ÑÒÐÎÊ ÏÎÑËÅ ÇÀÌÅÍÛ ÏÐÎÁÅËÎÂ ÍÀ "_":
+     1. "Hello_world"
+     2. "C++_programming_is_fun"
+     3. "Lambda_expressions"
+     4. "STL_algorithms"
+     5. "Short"
+     6. "A_very_long_string_just_for_testing_purposes"
+
+ÐÅÇÓËÜÒÀÒ ÏÎÈÑÊÀ ÇÀÄÀÍÍÎÃÎ ÑËÎÂÀ:
+Èñêîìîå ñëîâî: world
+     1. Hello world
+
+ÎÁÙÅÅ ÊÎËÈ×ÅÑÒÂÎ ÑÈÌÂÎËΠÁÅÇ "_": 114
+
+ÂÅÊÒÎÐ ÄËÈÍ ÑÒÐÎÊ:
+     1. 11
+     2. 22
+     3. 18
+     4. 14
+     5. 5
+     6. 44