It seems javascript tests are not correct. My C++ code has passed all tests, but absolutely the same javascript code failed with better value:

Big number random tests
✔ Test Passed: Value == 2211
✔ Test Passed: Value == 2211
✔ Test Passed: Value == 804
✔ Test Passed: Value == 1809
✔ Test Passed: Value == 603
✔ Test Passed: Value == 603
✔ Test Passed: Value == 603
✔ Test Passed: Value == 3015
✘ Expected: 1005, instead got: 804
✘ Expected: 1005, instead got: 804