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 Ruby (2.7.1) (judge verdict: Runtime Error)

_n, s = gets.chomp.split(" ").map(&:to_i)
as = gets.chomp.split(" ").map(&:to_i)

ans = {}
count = 0
(1.._n).each do |n|
  as.combination(n).each do |target|
    (1..target.size).each do |m|
      target.combination(m).each do |_target|
        if ans[_target] || s == _target.sum
          ans[_target] = true
          count += 1
        end
      end
    end
  end
end

puts count