added double jump and sitting state

term1/seminar03_initialization/03_string_multiplication/main.cpp

@@ -0,0 +1,24 @@
+#include <iostream>
+#include <string>
+
+using namespace std;
+
+string operator*(const string str, int n) {
+    string result;
+    for (int i = 0; i < n; ++i)
+        result += str; 
+    return result;
+}
+
+string operator*(int n, const string str) {
+    string result;
+    for (int i = 0; i < n; ++i)
+        result += str; 
+    return result;
+}
+
+int main() {
+    string meow;
+    cin >> meow;
+    cout << 3 * meow << endl;
+}