Compilare: user.cpp: In function ‘int main()’: user.cpp:12:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < M; ++i) ^ user.cpp:19:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < (y-x)/jump; ++i) nr = (nr<<jump) + temp; ^ user.cpp:23:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < N; ++i) ^ user.cpp:26:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < M; ++k) ^