diff --git a/src/klotski/all_cases/all_cases.h b/src/klotski/all_cases/all_cases.h
index 6e83cc3..8a94bd2 100644
--- a/src/klotski/all_cases/all_cases.h
+++ b/src/klotski/all_cases/all_cases.h
@@ -27,6 +27,7 @@
 #include <mutex>
 #include <vector>
 #include <cstdint>
+#include <numeric>
 #include "basic_ranges.h"
 
 namespace klotski {
@@ -37,6 +38,9 @@ namespace klotski {
         2322050, 1876945, 2322050, 0,
         2942906, 2260392, 2942906, 0,
     };
+    const uint32_t ALL_CASES_SIZE_SUM = std::accumulate( // aka 29334498
+        ALL_CASES_SIZE, ALL_CASES_SIZE + 16, (uint32_t)0
+    );
 
     class AllCases : public BasicRanges {
     public:
diff --git a/src/klotski/ffi/tmain.cc b/src/klotski/ffi/tmain.cc
index fad95b3..ea2c7fb 100644
--- a/src/klotski/ffi/tmain.cc
+++ b/src/klotski/ffi/tmain.cc
@@ -9,11 +9,15 @@
 #include "common.h"
 #include "benchmark.h"
 
+#include "all_cases.h"
+
 using namespace klotski;
 
 void tmain() {
     printf("tmain start\n");
 
+    std::cout << ALL_CASES_SIZE_SUM << std::endl;
+
 //    uint64_t common_code = 0x1A9BC0C00;
 //    klotski::Common::range_reverse(common_code);
 
diff --git a/test/all_cases.cc b/test/all_cases.cc
index 5153091..37aa211 100644
--- a/test/all_cases.cc
+++ b/test/all_cases.cc
@@ -7,12 +7,12 @@ using klotski::AllCases;
 using klotski::BasicRanges;
 using klotski::ALL_CASES_SIZE;
 using klotski::BASIC_RANGES_SIZE;
+using klotski::ALL_CASES_SIZE_SUM;
 
 /// basic ranges constants
 const char BASIC_RANGES_MD5[] = "6f385dc171e201089ff96bb010b47212";
 
 /// all cases constants
-const uint32_t ALL_CASES_SIZE_SUM = 29334498;
 const char ALL_CASES_MD5[] = "3888e9fab8d3cbb50908b12b147cfb23";
 
 /// basic ranges size check