Problem:
Score: 100 points

Problem Statement

In this problem, a date is written as Y-M-D. For example, 2019-11-30 means November 30, 2019.

Integers M_1, D_1, M_2, and D_2 will be given as input.

It is known that the date 2019-M_2-D_2 follows 2019-M_1-D_1.

Determine whether the date 2019-M_1-D_1 is the last day of a month.

Constraints

Both 2019-M_1-D_1 and 2019-M_2-D_2 are valid dates in the Gregorian calendar.

The date 2019-M_2-D_2 follows 2019-M_1-D_1.

Input

Input is given from Standard Input in the following format:

M_1 D_1
M_2 D_2

Output

If the date 2019-M_1-D_1 is the last day of a month, print 1; otherwise, print 0.

Sample Input 1

11 16
11 17

Sample Output 1

0

November 16 is not the last day of a month.

Sample Input 2

11 30
12 1

Sample Output 2

1

November 30 is the last day of November.

Solution in JavaScript (node.js v5.12) (judge verdict: Runtime Error)

// @flow

const main = (input /*: string */) => {
  const r = reader(input)
  const [m1, d1] = r.ns()
  // const [m2, d2] = r.ns()
  if (m1 === 2) {
    console.log(Number(d1 === 29))
  } else {
    console.log(Number(d1 === 30) ^ Number(((m1 >> 2) & 1) === 1))
  }
}

// const values = obj => Object.keys(obj).map(e => obj[e]);

const reader = (str /*: string*/) => {
  const lines = str.trim().split('\n')
  const s = () => lines.shift() || ''
  const n = () => Number(s())

  const ss = () => s().split(' ')
  const ns = () => ss().map(v => Number(v))
  return { lines, s, n, ss, ns }
}

const getInput = () => require('fs').readFileSync('/dev/stdin', 'utf8')
main(getInput())