restructure zeta/** to storage/zeta/**

storage/zeta/cpp/completed/2566.cpp

@@ -0,0 +1,21 @@
+#include<iostream>
+
+int main() {
+    int TM = 0;
+    int now;
+    int idx_x, idx_y;
+    for (int i = 0; i < 9; i++) {
+        for (int j = 0; j < 9; j++) {
+            std::cin >> now;
+            if (now >= TM) {
+                TM = now;
+                idx_x = i + 1;
+                idx_y = j + 1;
+            }
+        }
+
+    }
+
+    std::cout << TM << std::endl;
+    std::cout << idx_x << " " << idx_y << std::endl;
+}