67. Decoder

How do you plan to solve it?

module decoder3to8(
    input [2:0] s,
    output reg [7:0] y
);

always @(*) begin
    case (s)
        3'b000 : y <= 8'd1 ;
        3'b001 : y <= 8'd2 ;
        3'b010 : y <= 8'd4 ;
        3'b011 : y <= 8'd8 ;
        3'b100 : y <= 8'd16 ;
        3'b101 : y <= 8'd32;
        3'b110 : y <= 8'd64;
        3'b111 : y <= 8'd128;
        default : y <= 8'd0;
    endcase
end

endmodule