diff --git a/src/all_cases/basic_ranges.cc b/src/all_cases/basic_ranges.cc
index ebf7b6a..064cf34 100644
--- a/src/all_cases/basic_ranges.cc
+++ b/src/all_cases/basic_ranges.cc
@@ -51,7 +51,7 @@ void BasicRanges::build_data() { // build basic ranges
             }
         }
     }
-    std::sort(BasicRanges::data.begin(), BasicRanges::data.end()); // sort basic ranges
+    std::stable_sort(BasicRanges::data.begin(), BasicRanges::data.end()); // sort basic ranges
     for (auto &range : BasicRanges::data) {
         range = Common::range_reverse(range); // basic ranges reverse
     }
@@ -84,7 +84,6 @@ void BasicRanges::generate(generate_t info) { // generate specific basic ranges
             cache.pop();
             continue; // skip search
         }
-
         if (current.nx & 0xFF) { // n1 -> `00`
             cache.emplace(build_t {
                 .nx = current.nx - 0x01, // --n1
diff --git a/src/main.cc b/src/main.cc
index 186aec6..9196f97 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -245,7 +245,7 @@ int main() {
 
 //    }
 
-//    BasicRanges::build();
+    BasicRanges::build();
 //    const auto &br = BasicRanges::fetch();
 //    br.push_back(123);
 //    std::cout << "size: " << BasicRanges::fetch().size() << std::endl;
@@ -270,7 +270,7 @@ int main() {
 //    }
 
 //    printf("%09lX\n", ShortCode::tiny_decode_demo(14323231));
-    std::cout << ShortCode::tiny_encode_demo(0x6EC0F8800) << std::endl;
+//    std::cout << ShortCode::tiny_encode_demo(0x6EC0F8800) << std::endl;
 
 //    auto br = BasicRanges::fetch();
 //    for (auto &range : br) {