use std::io::{self, Read}; #[derive(Debug)] struct Input { n: i32, a: Vec } fn next_token(cin_lock: &mut io::StdinLock) -> String { cin_lock .by_ref() .bytes() .map(|c| c.unwrap() as char) .skip_while(|c| c.is_whitespace()) .take_while(|c| !c.is_whitespace()) .collect::() } fn read_input(cin_lock: &mut io::StdinLock) -> Input { let n = next_token(cin_lock).parse().unwrap(); let a = (0..n).map(|_| next_token(cin_lock).parse().unwrap()).collect(); Input { n, a, } } fn solve(input: Input, _cin_lock: &mut io::StdinLock) { let answer = input.a.into_iter().sum::(); println!("{}", answer); } fn main() { let cin = io::stdin(); let mut cin_lock = cin.lock(); let input = read_input(&mut cin_lock); solve(input, &mut cin_lock); }