Compilare: user.cpp: In function ‘long long int check_withdraw(long long int)’: user.cpp:25:22: warning: array subscript is above array bounds [-Warray-bounds] if(bancnote[2][i]!=0&&provisional_sum<=bancnote[1][i]) ^ user.cpp:31:41: warning: array subscript is above array bounds [-Warray-bounds] bancnote[2][i]-=how_many; ^ user.cpp:36:27: warning: array subscript is above array bounds [-Warray-bounds] bancnote[2][i]=0; ^