Compilare: user.cpp: In function ‘void solve()’: user.cpp:14:8: warning: left operand of comma operator has no effect [-Wunused-value] ls,ld,cs,cd; ^ user.cpp:14:11: warning: right operand of comma operator has no effect [-Wunused-value] ls,ld,cs,cd; ^ user.cpp:14:14: warning: right operand of comma operator has no effect [-Wunused-value] ls,ld,cs,cd; ^ user.cpp:14:16: warning: right operand of comma operator has no effect [-Wunused-value] ls,ld,cs,cd; ^