diff --git a/klotski/all_cases.cc b/klotski/all_cases.cc
index 238ae52..b8efe7c 100644
--- a/klotski/all_cases.cc
+++ b/klotski/all_cases.cc
@@ -107,6 +107,17 @@ void AllCases::find_all_cases() { // find all valid cases
     }
 }
 
+AllCases::AllCases(enum InitType init) {
+    switch (init) {
+        case InitType::WITH_ALL_CASES:
+            get_all_cases();
+        case InitType::WITH_BASIC_RANGES:
+            get_basic_ranges();
+        case WITH_NOTHING:
+            break;
+    }
+}
+
 const std::vector<uint32_t>* AllCases::get_basic_ranges() {
     if (basic_ranges.empty()) {
         build_basic_ranges(); // basic ranges initialize
diff --git a/klotski/all_cases.h b/klotski/all_cases.h
index 98084fc..1c45259 100644
--- a/klotski/all_cases.h
+++ b/klotski/all_cases.h
@@ -5,7 +5,14 @@
 
 class AllCases {
 public:
-//    AllCases() {}
+    enum InitType {
+        WITH_NOTHING,
+        WITH_BASIC_RANGES,
+        WITH_ALL_CASES,
+    };
+
+    explicit AllCases(enum InitType init);
+    AllCases():AllCases(InitType::WITH_NOTHING) {};
     const std::vector<uint32_t>* get_basic_ranges();
     const std::vector<uint32_t> (*get_all_cases())[16];
 
diff --git a/klotski/main.cc b/klotski/main.cc
index 04f1d51..ad78994 100644
--- a/klotski/main.cc
+++ b/klotski/main.cc
@@ -3,10 +3,15 @@
 
 int main() {
 
-    auto a = AllCases();
+//    auto a = AllCases();
+//    auto a = AllCases(AllCases::InitType::WITH_NOTHING);
+//    auto a = AllCases(AllCases::InitType::WITH_BASIC_RANGES);
+    auto a = AllCases(AllCases::InitType::WITH_ALL_CASES);
 
-    std::cout << "basic range size: " << a.get_basic_ranges()->size() << std::endl;
+    std::cout << "start get basic ranges" << std::endl;
+    std::cout << "basic range: " << a.get_basic_ranges()->size() << std::endl;
 
+    std::cout << "start get all cases" << std::endl;
     for (const auto &temp : *a.get_all_cases()) {
         std::cout << temp.size() << std::endl;
     }