init commit

contests/2contest/5.cpp

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+#include <iostream>
+using namespace std;
+
+class Row
+{
+public:
+    int* const cells = new int[3];
+
+    int*
+        begin() const {
+        return cells;
+    }
+
+    int*
+        end() const {
+        return cells + 3;
+    }
+
+    int& operator[](int ind) const {
+        return cells[ind];
+    }
+};
+
+class Matrix
+{
+public:
+    const Row r[3];
+
+    const Row*
+        begin() const {
+        return r;
+    }
+
+    const Row*
+        end() const {
+        return r + 3;
+    }
+
+    int&
+        operator[](int ind1, int ind2) {
+        return r[ind1][ind2];
+    }
+};
+
+// int
+// main() {
+//     Matrix m;
+//     m[1, 1] = 5;
+
+//     for (const auto& row : m) {
+//         for (auto cell : row) {
+//             cout << cell << " ";
+//         }
+//         cout << "\n";
+//     }
+// }