1writeln("Hello World?");2(1) (-1e10) (0xabcdef) 'y'3[x] x->y x.y4!x ~x x++ x-- x*y x&y5x*y x/y x%y6x+y x-y7x<<y x>>y8x<y x<=y x>y x>=y9x==y x!=y10x&y11x^y12x|y13x&&y14x||y15x?y:z16x=y x+=y x-=y x*=y x/=y x%=y x<<=y x>>=y x&=y x^=y x|=y17x,y18x::y