diff --git a/seminar04_templates/05_maximum/main.cpp b/seminar04_templates/05_maximum/main.cpp
index 9df3256..37075cc 100644
--- a/seminar04_templates/05_maximum/main.cpp
+++ b/seminar04_templates/05_maximum/main.cpp
@@ -7,7 +7,7 @@ using std::string, std::pair, std::cout, std::endl, std::vector;
 
 template <typename T>
 T maximum(const vector<T>& v) {
-    T max;
+    T max{};
     for(int i = 0, size = v.size(); i < size; ++i) {
         if (v[i] > max)
                 max = v[i];
diff --git a/seminar05_iterators/01_slide/main.cpp b/seminar05_iterators/01_slide/main.cpp
new file mode 100644
index 0000000..d5a23a7
--- /dev/null
+++ b/seminar05_iterators/01_slide/main.cpp
@@ -0,0 +1,22 @@
+#include <vector>
+#include <iostream>
+#include <algorithm>
+
+using std::cout, std::endl, std::vector, std::cin;
+
+int main() {
+    size_t n;
+    cin >> n;
+    vector<int> v(n);
+    for (int i = 0; i < n; ++i)
+            cin >> v[i];
+
+   vector<int>::iterator max = std::max_element(v.begin(), v.end());
+   std::sort(v.begin(), max);
+   std::sort(max, v.end()); 
+   std::reverse(max, v.end());
+
+   for (int i = 0; i < v.size(); ++i)
+           cout << v[i] << (i == v.size() - 1 ? "": " ");
+   cout << endl;
+}
diff --git a/seminar05_iterators/02_string_vector_reverse/main.cpp b/seminar05_iterators/02_string_vector_reverse/main.cpp
new file mode 100644
index 0000000..fb6f1b3
--- /dev/null
+++ b/seminar05_iterators/02_string_vector_reverse/main.cpp
@@ -0,0 +1,27 @@
+#include <iostream>
+#include <string>
+#include <vector>
+#include <algorithm>
+
+using std::cout, std::endl, std::string, std::vector;
+
+void string_vector_reverse(vector<string>& sv) {
+    std::for_each(sv.begin(), sv.end(), [](string& s){ std::reverse(s.begin(), s.end()); });
+    std::reverse(sv.begin(), sv.end());
+}
+
+int main() {
+
+    vector<string> sv1 {"cat", "dog", "mouse", "elephant"};
+    vector<string> sv2 {"a", "bc"};
+
+    string_vector_reverse(sv1);
+    string_vector_reverse(sv2);
+
+    for (int i = 0; i < sv1.size(); ++i)
+            cout << sv1[i] << (i == sv1.size() - 1 ? "" : " ");
+    cout << endl;
+    for (int i = 0; i < sv2.size(); ++i)
+            cout << sv2[i] << (i == sv2.size() - 1 ? "" : " ");
+    cout << endl;
+}
diff --git a/seminar05_iterators/03_is_uppper/main.cpp b/seminar05_iterators/03_is_uppper/main.cpp
new file mode 100644
index 0000000..a002373
--- /dev/null
+++ b/seminar05_iterators/03_is_uppper/main.cpp
@@ -0,0 +1,18 @@
+#include <algorithm>
+#include <iostream>
+#include <algorithm>
+#include <string>
+#include <numeric>
+#include <cctype>
+
+using std::string, std::cin, std::cout, std::endl;
+
+bool strIsUpper(const string& s) {
+    return std::accumulate(s.begin(), s.end(), true, [](bool res, char c) {return res && (!isalpha(c) || isupper(c)); });
+}
+
+int main() {
+    string s;
+    getline(cin, s);
+    cout << strIsUpper(s) << endl;
+}
diff --git a/seminar05_iterators/04_is_identifier/main.cpp b/seminar05_iterators/04_is_identifier/main.cpp
new file mode 100644
index 0000000..edcee1e
--- /dev/null
+++ b/seminar05_iterators/04_is_identifier/main.cpp
@@ -0,0 +1,22 @@
+#include <iostream>
+#include <algorithm>
+#include <string>
+#include <string_view>
+#include <cctype>
+
+using std::cout, std::endl, std::string, std::string_view;
+
+bool isIdentifier(string_view sv) {
+    bool is = true;
+    if (!(std::isalpha(sv[0]) || sv[0] == '_'))
+            return false;
+    if (std::all_of(sv.begin(), sv.end(), [](const char c){ return isalpha(c) || isdigit(c) || c == '_' ;}))
+            return true;
+    return false;
+}
+
+int main() {
+    string s;
+    getline(std::cin, s);
+    cout << isIdentifier(s) << endl;
+}
diff --git a/seminar05_iterators/05_move_spaces/main.cpp b/seminar05_iterators/05_move_spaces/main.cpp
new file mode 100644
index 0000000..19dad49
--- /dev/null
+++ b/seminar05_iterators/05_move_spaces/main.cpp
@@ -0,0 +1,18 @@
+#include <iostream>
+#include <string>
+#include <algorithm>
+
+using std::cout, std::string, std::endl;
+
+void move_spaces(string& s) {
+        std::stable_sort(s.begin(), s.end(), [](const char& a, const char& b){ return (b == ' '); });
+}
+
+int main() {
+        string s;
+        std::getline(std::cin, s);
+        move_spaces(s);
+        // So we can see spaces
+        cout << s << "###" << endl;
+
+}
diff --git a/seminar05_iterators/homework_iterators.pdf b/seminar05_iterators/homework_iterators.pdf
new file mode 100644
index 0000000..86e4bdc
Binary files /dev/null and b/seminar05_iterators/homework_iterators.pdf differ