diff --git a/src/fast_cal.cc b/src/fast_cal.cc
deleted file mode 100644
index ff65b47..0000000
--- a/src/fast_cal.cc
+++ /dev/null
@@ -1,178 +0,0 @@
-#include <iostream>
-#include <unordered_map>
-#include <functional>
-#include <queue>
-#include "core.h"
-#include "fast_cal.h"
-#include "raw_code.h"
-#include "common.h"
-
-struct fast_cal_t {
-    uint64_t code;
-    uint64_t mask;
-//    uint32_t step;
-    fast_cal_t *last;
-};
-
-std::queue<fast_cal_t*> cache;
-
-std::unordered_map<uint64_t, fast_cal_t> cases;
-
-
-class FastCal;
-class GlobalCal;
-
-//template<typename T>
-class CoreDemo {
-public:
-//    typedef void (T::*release_t)(uint64_t);
-
-    std::function<void(uint64_t)> release;
-
-//    void next(uint64_t code, T *f, release_t release_func) {
-    void next(uint64_t code) {
-
-        std::cout << "Core get code = " << code << std::endl;
-        std::cout << "Core callback first time" << std::endl;
-//        (f->*release_func)(++code);
-        release(++code);
-        std::cout << "Core callback second time" << std::endl;
-//        (f->*release_func)(++code);
-        release(++code);
-        std::cout << "Core function exit" << std::endl;
-
-    }
-
-};
-
-class FastCal {
-public:
-    uint64_t data;
-
-    explicit FastCal(uint64_t dat) : data(dat) {}
-
-    void callback(uint64_t code) {
-        std::cout << "FastCal get callback " << code << std::endl;
-        data = code;
-        std::cout << "FastCal set data " << data << std::endl;
-    }
-
-    void run() {
-//        auto cd = CoreDemo<FastCal>();
-        auto cd = CoreDemo();
-        cd.release = std::bind(&FastCal::callback, this, std::placeholders::_1);
-
-        std::cout << "FastCal data = " << data << std::endl;
-
-//        cd.next(data, this, &FastCal::callback);
-        cd.next(data);
-    }
-
-};
-
-class GlobalCal {
-public:
-    uint64_t data;
-
-    explicit GlobalCal(uint64_t dat) : data(dat) {}
-
-    void callback(uint64_t code) {
-        std::cout << "GlobalCal get callback " << code << std::endl;
-        data = code;
-        std::cout << "GlobalCal set data " << data << std::endl;
-    }
-
-    void run() {
-//        auto cd = CoreDemo<GlobalCal>();
-        auto cd = CoreDemo();
-        cd.release = std::bind(&GlobalCal::callback, this, std::placeholders::_1);
-
-        std::cout << "GlobalCal data = " << data << std::endl;
-
-//        cd.next(data, this, &GlobalCal::callback);
-        cd.next(data);
-    }
-
-};
-
-
-void add_new_case(uint64_t code, uint64_t mask) {
-
-    auto exist_case = cases.find(code);
-    if (exist_case != cases.end()) { // find existed case
-
-        exist_case->second.mask |= mask; // mask update
-        return;
-
-    }
-
-    cases[code] = fast_cal_t {
-        .code = code,
-        .mask = mask,
-        .last = cache.front(),
-    };;
-    cache.emplace(&cases[code]);
-
-    // TODO: try to check head address = 0xD at here
-
-//    if (((code >> (3 * 0xD)) & 0b111) == B_2x2) {
-//        std::cout << "Resolved" << std::endl;
-//            std::cout << RawCode(cache.front()->code).dump_case() << std::endl;
-//        stop_flag = true;
-//    }
-
-}
-
-uint32_t fast_cal(uint64_t code) {
-
-    auto f1 = FastCal(1000);
-    auto f2 = FastCal(2000);
-    auto g = GlobalCal(3000);
-
-    f2.run();
-    f1.run();
-    f1.run();
-    g.run();
-
-//    auto g = GlobalCal();
-//    g.run();
-
-    return 0;
-
-
-    auto core = Core(add_new_case);
-
-    cases.empty();
-
-    cache.empty();
-
-    cases[code] = fast_cal_t {
-        .code = code,
-        .mask = 0,
-        .last = nullptr,
-    };
-    cache.emplace(&cases[code]);
-
-    while (!cache.empty()) {
-
-        // break check point
-        if (((cache.front()->code >> (3 * 0xD)) & 0b111) == B_2x2) {
-            std::cout << "Resolved" << std::endl;
-//            std::cout << RawCode(cache.front()->code).dump_case() << std::endl;
-            break;
-        }
-
-//        core.next_step(cache.front()->code, cache.front()->mask);
-        cache.pop();
-    }
-
-    auto solution = cache.front();
-
-    while (solution != nullptr) {
-        std::cout << RawCode(solution->code).dump_case() << std::endl;
-        solution = solution->last;
-    }
-
-    return cases.size();
-
-}