Compilare: user.cpp: In function ‘int main()’: user.cpp:14:43: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 2 has type ‘int’ [-Wformat=] printf("%lld\n", N * (N + 1) * (N - 1)/3); ^ user.cpp:16:58: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 2 has type ‘int’ [-Wformat=] printf("%lld\n", N * (N - 1) * (N - 2)/ 3 + N * (N - 1)); ^ user.cpp:5:12: warning: unused variable ‘s’ [-Wunused-variable] long long s = 0; ^