let input = [
    '002'
];

let print = this.print || console.log;
let gets = this.gets || ((arr, index) => () => arr[index++])(input, 0);

let arr = gets().split('').map(Number);

let firstNum = arr[0];
let secondNum = arr[1];
let thirdNum = arr[2];

let totalSum = 1;

if (firstNum === 1 && secondNum > 1 && thirdNum > 1) {
    totalSum = firstNum + secondNum * thirdNum;
} else if (firstNum > 1 && secondNum === 1 && thirdNum > 1) {
    totalSum = firstNum + secondNum + thirdNum;
} else if (firstNum > 1 && secondNum > 1 && thirdNum === 1) {
    totalSum = firstNum * secondNum + thirdNum;
} else if (firstNum > 1 && secondNum > 1 && thirdNum > 1) {
    totalSum = firstNum * secondNum * thirdNum;
} else if (firstNum === 1 && secondNum === 1 && thirdNum > 1) {
    totalSum = firstNum + secondNum * thirdNum;
} else if (firstNum === 1 && secondNum > 1 && thirdNum === 1) {
    totalSum = firstNum + secondNum + thirdNum;
} else if (firstNum > 1 && secondNum === 1 && thirdNum === 1) {
    totalSum = firstNum + secondNum + thirdNum;
} else if (firstNum === 0 || secondNum === 0 || thirdNum === 0) {
    totalSum = firstNum + secondNum + thirdNum;
}else{
    totalSum = firstNum + secondNum + thirdNum;
}
print(totalSum);