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use std::io ;
fn digitsum( num : i32 ) -> i32 {
let mut sum : i32 = 0 ;
let mut n : i32 = num ;
while n != 0 {
sum = sum + n % 10 ;
n = n / 10 ;
}
sum
}
fn main() {
println!("Enter some integers, separated by blanks!");
let mut inline : String = String::new( ) ;
io::stdin( ).read_line( &mut inline ).unwrap( ) ;
let entered_line : &str = &*inline ;
let numbers : Vec<i32> = entered_line.split_whitespace( ).map( | s |
s.trim( ).parse::<i32>( ).unwrap( )).collect( ) ;
let element_sum : i32 = numbers.iter( ).sum( ) ;
let mut digit_sum : i32 = 0 ;
numbers.iter( ).map( | d | {
let ds : i32 = digitsum( *d ) ;
ds
}).for_each( | n | digit_sum += n ) ;
println!("{}" , (element_sum - digit_sum).abs( ) ) ;
}
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