Problem2284--Lacked Number

2284: Lacked Number

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Time Limit : 1.000 sec  Memory Limit : 128 MB

SubmitSolved: 26Submit Num: 36Statistics

Description

Time Limit: 2 sec / Memory Limit: 1024 MB

Score : 100100 points

Problem Statement

You are given a string SS of length exactly 99 consisting of digits. One but all digits from 0 to 9 appear exactly once in SS.
Print the only digit missing in SS.

Constraints

  • SS is a string of length 99 consisting of digits.
  • All characters in SS are distinct.

Input

Input is given from Standard Input in the following format: 
SS

Output

Print the only digit missing in SS.

Sample Input Copy 

023456789

Sample Output Copy 

1

HINT

The string 023456789 only lacks 11. Thus, 11 should be printed.

Source/Category

AtCoder 
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