diff --git a/homework/Savchenko/01/Timer.hpp b/homework/Savchenko/01/Timer.hpp
new file mode 100644
index 0000000..ea2c1f5
--- /dev/null
+++ b/homework/Savchenko/01/Timer.hpp
@@ -0,0 +1,31 @@
+
+#ifndef sum_by_rows_hpp
+#define sum_by_rows_hpp
+
+#include <chrono>
+#include <iostream>
+
+class Timer
+{
+    using clock_t = std::chrono::high_resolution_clock;
+    using microseconds = std::chrono::microseconds;
+public:
+    Timer()
+    : start_(clock_t::now())
+    {
+    }
+    
+    ~Timer()
+    {
+        const auto finish = clock_t::now();
+        const auto us =
+        std::chrono::duration_cast<microseconds>
+        (finish - start_).count();
+        std::cout << us << " us" << std::endl;
+    }
+    
+private:
+    const clock_t::time_point start_;
+};
+
+#endif /* sum_by_rows_hpp */
diff --git a/homework/Savchenko/01/sum_by_col b/homework/Savchenko/01/sum_by_col
new file mode 100755
index 0000000..1677a43
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diff --git a/homework/Savchenko/01/sum_by_col.cpp b/homework/Savchenko/01/sum_by_col.cpp
new file mode 100644
index 0000000..cecc306
--- /dev/null
+++ b/homework/Savchenko/01/sum_by_col.cpp
@@ -0,0 +1,27 @@
+#include "Timer.hpp"
+#include <iostream>
+
+#define N 998
+
+int sum_by_col()
+{
+    int arr[N][N];
+    for (int i = 0; i < N; i++)
+        for (int j = 0; j < N; j++)
+            arr[i][j] = (i + j) % 100;
+    
+    Timer timer;
+    
+    int sum = 0;
+    for (int i = 0; i < N; i++)
+        for (int j = 0; j < N; j++)
+            sum += arr[j][i];
+    
+    return sum;
+    
+}
+
+int main()
+{
+    std::cout << sum_by_col() << std::endl;
+}
diff --git a/homework/Savchenko/01/sum_by_rows b/homework/Savchenko/01/sum_by_rows
new file mode 100755
index 0000000..26893f8
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diff --git a/homework/Savchenko/01/sum_by_rows.cpp b/homework/Savchenko/01/sum_by_rows.cpp
new file mode 100644
index 0000000..3b2ddec
--- /dev/null
+++ b/homework/Savchenko/01/sum_by_rows.cpp
@@ -0,0 +1,27 @@
+#include "Timer.hpp"
+#include <iostream>
+
+#define N 998
+
+int sum_by_rows()
+{
+    int arr[N][N];
+    for (int i = 0; i < N; i++)
+        for (int j = 0; j < N; j++)
+            arr[i][j] = (i + j) % 100;
+    
+    Timer timer;
+    
+    int sum = 0;
+    for (int i = 0; i < N; i++)
+        for (int j = 0; j < N; j++)
+            sum += arr[i][j];
+    
+    return sum;
+    
+}
+
+int main()
+{
+    std::cout << sum_by_rows() << std::endl;
+}