結果
| 問題 | No.1299 Random Array Score | 
| コンテスト | |
| ユーザー |  uw_yu1rabbit | 
| 提出日時 | 2020-12-11 17:54:19 | 
| 言語 | Rust (1.83.0 + proconio) | 
| 結果 | 
                                WA
                                 
                             | 
| 実行時間 | - | 
| コード長 | 959 bytes | 
| コンパイル時間 | 11,684 ms | 
| コンパイル使用メモリ | 404,128 KB | 
| 実行使用メモリ | 6,948 KB | 
| 最終ジャッジ日時 | 2024-09-19 21:25:47 | 
| 合計ジャッジ時間 | 12,916 ms | 
| ジャッジサーバーID (参考情報) | judge3 / judge4 | 
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| ファイルパターン | 結果 | 
|---|---|
| sample | AC * 3 | 
| other | AC * 3 WA * 31 | 
コンパイルメッセージ
warning: unused import: `std::collections::*` --> src/main.rs:4:5 | 4 | use std::collections::*; | ^^^^^^^^^^^^^^^^^^^ | = note: `#[warn(unused_imports)]` on by default warning: variable does not need to be mutable --> src/main.rs:23:9 | 23 | let mut k:u64 = read(); | ----^ | | | help: remove this `mut` | = note: `#[warn(unused_mut)]` on by default warning: variable does not need to be mutable --> src/main.rs:24:9 | 24 | let mut a:Vec<u64> = (0..n).map(|_| read()).collect(); | ----^ | | | help: remove this `mut` warning: variable does not need to be mutable --> src/main.rs:25:9 | 25 | let mut f:u64 = a.into_iter().sum(); | ----^ | | | help: remove this `mut` warning: constant `Mod` should have an upper case name --> src/main.rs:20:7 | 20 | const Mod:u64 = 998244353; | ^^^ help: convert the identifier to upper case: `MOD` | = note: `#[warn(non_upper_case_globals)]` on by default
ソースコード
#[allow(unused_imports)]
//use proconio::*;
use std::cmp::*;
use std::collections::*;
use std::io::*;
use std::iter::*;
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")
}
const Mod:u64 = 998244353;
fn main() {
    let n:usize = read();
    let mut k:u64 = read();
    let mut a:Vec<u64> = (0..n).map(|_| read()).collect();
    let mut f:u64 = a.into_iter().sum();
    println!("{}",(rep_mul(2u64,k) * f) % Mod);
}
fn rep_mul(mut x: u64, mut n: u64) -> u64{
    let mut ans:u64 = 1;
    while n > 0{
       if n % 2 == 1 {
           ans = x * ans % Mod;
       }
           x = x * x % Mod;
           n = n >> 1u64;
    }
    ans
}
            
            
            
        