TASK

Problem

#27

Given a positive three-digit integer, print its first digit.

EXAMPLE

Example

Input

583

Output

5

LIMITS

Constraints

100 ≤ n ≤ 999

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LEARN Theory for this problem

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### First Digit of a Three-Digit Number

Integer division separates higher decimal/time units, while `%` returns the remainder. These two operations let a program isolate digits or split a total number of seconds/minutes into components.

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NEED HELP? Hints

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['Decide which part comes from division and which part comes from the remainder.', 'Separate input parsing, result computation, and output into distinct steps so errors are easier to spot.']

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ANSWER Solution

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const fs = require('fs');

const text = fs.readFileSync(0, 'utf8').trim();
const firstDigit = Number(text[0]);

console.log(firstDigit);