Add multilingual language and systems learning tracks

en/cpp-practice-20261101/lesson-1/main.cpp

@@ -0,0 +1,11 @@
+#include <iostream>
+#include <vector>
+#include <string>
+#include <cassert>
+
+int main() {
+    std::vector<int> minutes{1, 2, 3};
+    int total = 0;
+    for (int value : minutes) total += value;
+    std::cout << total << "\n";
+}