Compilare: user.cpp:10:25: warning: overflow in implicit constant conversion [-Woverflow] const unsigned f_mare = 2e+15; ^ user.cpp: In function ‘void bf(int)’: user.cpp:21:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1; i <= n; i++) ^ user.cpp:38:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1; i <= n; i++) ^ user.cpp: In function ‘int main()’: user.cpp:57:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1; i < (1 << k); i++) ^ user.cpp:66:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1; i < (1 << k); i++) ^