i just tried the second solution, in timed out

i literally copied a solution and it didnt work, execution timed out.
i tried my solutions but i was slow for large number like 9999999999. then i upgraded it but random number were bigger (1003427533368395383) and my solution couldnt kepp up, so frustrated i check the solution (i was on the right path but i was missing some detail) and i tried it, and it failed with a even larger number (4802419968590657004)
just to know the random test isnt even random, it generate the same big number over and over

thanks man, didnt think about that

its happening something strange, my code seems to work, i pass the test but when i submit it, it fails the same layout as the test. it doesnt make sense tho.
i logged the input field so i know they are equal

main.cpp:44:22: warning: comparison of integers of different signs: 'int' and 'std::vector::size_type' (aka 'unsigned long') [-Wsign-compare]
for (auto i= 0; i<prime.size(); i++){
~^~~~~~~~~~~~~
main.cpp:45:26: warning: comparison of integers of different signs: 'int' and 'std::vector::size_type' (aka 'unsigned long') [-Wsign-compare]
for (auto j= i; j<prime.size(); j++){
~^~~~~~~~~~~~~
main.cpp:53:22: warning: comparison of integers of different signs: 'int' and 'std::vector::size_type' (aka 'unsigned long') [-Wsign-compare]
for (auto i= 0; i<prime.size(); i++){
~^~~~~~~~~~~~~
main.cpp:54:26: warning: comparison of integers of different signs: 'int' and 'std::vector::size_type' (aka 'unsigned long') [-Wsign-compare]
for (auto j= i; j<prime.size(); j++){
~^~~~~~~~~~~~~
main.cpp:66:20: warning: unused function 'SumOfDivided' [-Wunused-function]
static std::string SumOfDivided(std::vector &lst){
^
5 warnings generated.
/tmp/main-1d7c7a.o: In function sumOfDivided_Tests::Fixed_Tests()': main.cpp:(.text._ZN18sumOfDivided_Tests11Fixed_TestsEv[_ZN18sumOfDivided_Tests11Fixed_TestsEv]+0x5c): undefined reference to SumOfDivided::sumOfDivided[abi:cxx11](std::vector<int, std::allocator >&)'
clang: error: linker command failed with exit code 1 (use -v to see invocation)

can't understand whats wrong, it worked in my editor. i understand the first 4 warning but not the 5th