Submission #3450751

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Source Code Expand

use scanner::Scanner;
use std::cmp::max;

fn main() {
    let mut sc = Scanner::new();
    let n: usize = sc.read();
    let mut a = 1u64;
    let mut b = 1u64;
    let mut ans = 1;
    for _ in 0..n {
        let x: u64 = sc.read();
        let y: u64 = sc.read();
        ans = max(if a % x == 0 { a / x } else { a / x + 1 }, if b % y == 0 { b / y } else { b / y + 1 });
        a = ans * x;
        b = ans * y;
    }
    println!("{}", a + b);
}

mod scanner {
    pub struct Scanner<'a> {
        s: String,
        words: ::std::str::SplitWhitespace<'a>,
    }

    impl<'a> Scanner<'a> {
        pub fn new() -> Scanner<'a> {
            let s = String::new();
            let words = unsafe { ::std::mem::transmute(s.split_whitespace()) };
            Scanner { s: s, words: words }
        }

        pub fn read<T: ::std::str::FromStr>(&mut self) -> T {
            match self.words.next() {
                Some(x) => x.parse().ok().unwrap(),
                None => {
                    self.load();
                    self.read()
                }
            }
        }

        fn load(&mut self) {
            self.s.clear();
            ::std::io::stdin().read_line(&mut self.s).unwrap();
            self.words = unsafe { ::std::mem::transmute(self.s.split_whitespace()) };
        }
    }
}

Submission Info

Compile Error

warning: value assigned to `ans` is never read, #[warn(unused_assignments)] on by default
 --> ./Main.rs:9:9
  |
9 |     let mut ans = 1;
  |         ^^^^^^^

Judge Result