Compilare: main.cpp: In function 'int main()': main.cpp:34:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (((long long)(sa+nrc*p_10[d])/(long long)j!=nr)&&(nrc<=5)) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~ main.cpp:38:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ((long long)(sa+nrc*p_10[d])/(long long)j==nr) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~