Compilare: user.cpp: In function 'int main()': user.cpp:6: warning: format '%lld' expects type 'long long int*', but argument 2 has type 'long unsigned int*' user.cpp:6: warning: format '%lld' expects type 'long long int*', but argument 3 has type 'long unsigned int*' user.cpp:7: warning: comparison between signed and unsigned integer expressions user.cpp:8: warning: format '%lld' expects type 'long long int*', but argument 2 has type 'long unsigned int*' user.cpp:15: warning: format '%lld' expects type 'long long int', but argument 2 has type 'long unsigned int' user.cpp:3: warning: unused variable 's1'