Problem:
Score : 100 points

Problem Statement

Compute A \times B.

Constraints

1 \leq A \leq 100

1 \leq B \leq 100

All values in input are integers.

Input

Input is given from Standard Input in the following format:

A B

Output

Print the value A \times B as an integer.

Sample Input 1

2 5

Sample Output 1

10

We have 2 \times 5 = 10.

Sample Input 2

100 100

Sample Output 2

10000

Solution in C (GCC 9.2.1) (judge verdict: Wrong Answer)

long p,a,k=1e18;
main(i){
	for(;~scanf("%ld",&a);)p=--i?1.*p*a>k?k+1:p*a:1;
	printf("%ld",p>k?-1:p);
}