Compilare: user.cpp: In function ‘long long unsigned int logexp(long long unsigned int, long long unsigned int)’: user.cpp:17:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;1<<i<=p;++i) ^ user.cpp: In function ‘int main()’: user.cpp:39:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<a.size();++i) ^ user.cpp:53:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<b.size();++i) ^ user.cpp:31:9: warning: variable ‘M10’ set but not used [-Wunused-but-set-variable] ull M10,M2; ^ user.cpp:31:13: warning: variable ‘M2’ set but not used [-Wunused-but-set-variable] ull M10,M2; ^