Compilare: user.cpp: In function ‘long long int get_row(long long int)’: user.cpp:34:8: warning: unused variable ‘sum’ [-Wunused-variable] ll sum = 0; ^ user.cpp: In function ‘void solve2()’: user.cpp:65:12: warning: unused variable ‘sum_aux’ [-Wunused-variable] ll sum_aux = 0; ^ user.cpp:67:12: warning: unused variable ‘number’ [-Wunused-variable] ll number = 0; ^ user.cpp: In function ‘long long int get_row(long long int)’: user.cpp:39:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘void solve1()’: user.cpp:21:24: warning: array subscript is below array bounds [-Warray-bounds] ll ans = pow2[s - 1]; ^