Compilare: user.cpp: In function ‘long int bruteforce(std::vector<long int>)’: user.cpp:78:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long i = 0; i < v.size() - 1; i++) ^ user.cpp:79:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long j = i + 1; j < v.size(); j++) { ^ user.cpp: In function ‘long int min_lcm(std::vector<long int>)’: user.cpp:100:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long j = mid + 1; j < v.size(); j++) { ^ user.cpp: In function ‘long int bruteforce(std::vector<long int>)’: user.cpp:87:1: warning: control reaches end of non-void function [-Wreturn-type] } ^