Problem1040--The sum of digits

1040: The sum of digits

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Time Limit : 1.000 sec  Memory Limit : 128 MiB

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Description

Given an integer with 4 digits, please output the sum of the digits.

Input

One integer with 4 digits 

Output

One integer which is the sum of the 4 digits

Sample Input Copy 

2341

Sample Output Copy 

10

Source/Category

 
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