function main(input) {

    const args = input.split(' ');
    const a = parseInt(args[0], 10);
    const b = parseInt(args[1], 10);

    c = a + b ;
    d = a - b ;
    e = a * b ;

    const max = Math.max('c' ,'d' , 'e')

    console.log(max);


}



main(require("fs").readFileSync("/dev/stdin", "utf8"));