Submission #1871878

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Source Code Expand

use std::io::{stdin, Read, StdinLock};
use std::str::FromStr;

struct Scanner<'a> {
    stdin: StdinLock<'a>,
}

impl<'a> Scanner<'a> {
    fn new(stdin: StdinLock<'a>) -> Scanner<'a> {
        return Scanner {stdin: stdin}
    }

    fn read1<T: FromStr>(&mut self) -> Option<T> {
        let token = self.stdin.by_ref().bytes().map(|c| c.unwrap() as char)
            .skip_while(|c| c.is_whitespace())
            .take_while(|c| !c.is_whitespace())
            .collect::<String>();
        return token.parse::<T>().ok();
    }

    fn read<T: FromStr>(&mut self) -> T {
        return self.read1().unwrap()
    }
}

fn main() {
    let stdin = stdin();
    let stdin = stdin.lock();
    let mut scanner = Scanner::new(stdin);

    let n: i32 = scanner.read();

    let mut ret = 0;
    for i in 0..n {
        let b: i32 = scanner.read();
        let c = b % 6;
        if c == 1 || c == 3 {
            ret += 0;
        } else if c == 2 || c == 4 {
            ret += 1;
        } else if c == 5 {
            ret += 2;
        } else {
            ret += 3;
        }
    }

    println!("{}", ret);
}

Submission Info

Compile Error

warning: unused variable: `i`, #[warn(unused_variables)] on by default
  --> ./Main.rs:34:9
   |
34 |     for i in 0..n {
   |         ^

Judge Result