Compilare: user.cpp: In function ‘int main()’: user.cpp:33:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<tmp.size();++i) ^ user.cpp:34:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=i+1;j<tmp.size();++j) ^ user.cpp:55:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (;i<gcd.size();++i) ^ user.cpp:58:12: warning: value computed is not used [-Wunused-value] gcd[i] << '\n'; ^