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: Runtime Error)

#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<math.h>

int main(void) {

  int i, c, d;
  long int n, a, e=pow(10,18), f=pow(10,5);
  long int val=1;

  c = scanf("%ld\n", &n);

  if((c!=1)||(n<2)||(f<n)) {
    printf("error\n");
    return -1;
  }


  for (i = 0; i < n; i++) {

    d = scanf("%ld", &a);

    if((d!=1)||(a<0)||(e<a)) {
      printf("error\n");
      return -1;
    }
    val *= a;
    a=0;
    d=0;
  }

  if (val > e) {
    printf("-1\n");
    return -1;
  }
  printf("%ld\n", val);

  return 0;
}