結果

問題 No.264 じゃんけん
コンテスト
ユーザー triggerwaffle
提出日時 2020-09-02 02:23:05
言語 Rust
(1.83.0 + proconio)
結果
WA  
実行時間 -
コード長 733 bytes
コンパイル時間 12,577 ms
コンパイル使用メモリ 390,928 KB
実行使用メモリ 6,824 KB
最終ジャッジ日時 2024-11-21 06:12:48
合計ジャッジ時間 13,529 ms
ジャッジサーバーID
（参考情報） 		judge4 / judge1
このコードへのチャレンジ
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ファイルパターン 結果
other WA * 9
権限があれば一括ダウンロードができます
コンパイルメッセージ
warning: variable `ans` is assigned to, but never used
  --> src/main.rs:19:13
   |
19 |     let mut ans = String::new();
   |             ^^^
   |
   = note: consider using `_ans` instead
   = note: `#[warn(unused_variables)]` on by default

warning: value assigned to `ans` is never read
  --> src/main.rs:20:19
   |
20 |     if a-b == 0 { ans = String::from("Drew"); }
   |                   ^^^
   |
   = help: maybe it is overwritten before being read?
   = note: `#[warn(unused_assignments)]` on by default

warning: value assigned to `ans` is never read
  --> src/main.rs:21:20
   |
21 |     if a-b == -2 { ans = String::from("Lose"); }
   |                    ^^^
   |
   = help: maybe it is overwritten before being read?

warning: value assigned to `ans` is never read
  --> src/main.rs:22:19
   |
22 |     if a-b == 1 { ans = String::from("Lose"); }
   |                   ^^^
   |
   = help: maybe it is overwritten before being read?

warning: value assigned to `ans` is never read
  --> src/main.rs:23:11
   |
23 |     else {ans = String::from("Won");}
   |           ^^^
   |
   = help: maybe it is overwritten before being read?

ソースコード

diff # 

use std::io::*;
use std::str::FromStr;

fn read<T: FromStr>() -> T {
    let stdin = stdin();
    let stdin = stdin.lock();
    let token: String = stdin
        .bytes()
        .map(|c| c.expect("failed to read char") as char) 
        .skip_while(|c| c.is_whitespace())
        .take_while(|c| !c.is_whitespace())
        .collect();
    token.parse().ok().expect("failed to parse token")
}

fn main() {
    let a: i64 = read(); // (*)
    let b: i64 = read();
    let mut ans = String::new();
    if a-b == 0 { ans = String::from("Drew"); }
    if a-b == -2 { ans = String::from("Lose"); }
    if a-b == 1 { ans = String::from("Lose"); }
    else {ans = String::from("Won");}
    let ans = a * (a+1)/2;
    println!("{}", ans);
}
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