Check for Digit 1

Background

Congcong is currently studying number properties. He wants to know if a positive integer contains the digit $1$.

Problem Description

Given a positive integer $n$, return true if its decimal representation contains the digit $1$; otherwise, return false.

Hint: You can use the modulo operator $$ to get the rightmost digit, and the division operator $/$ to discard the rightmost digit.

Input Format

Input is given from Standard Input in the following format.

A positive integer $n$.

Output Format

Output to Standard Output in the following format.

Output true if $n$ contains the digit $1$; otherwise, output false.

Sample

10

true

22

false

220

false

Sample Explanation

• Sample 1: $10$ contains the digit $1$, so output true.
• Sample 2: $22$ does not contain the digit $1$, so output false.
• Sample 3: $220$ does not contain the digit $1$, so output false.

Constraints

$1 \le n \le 10^9$