結果

問題 No.3 ビットすごろく
コンテスト
ユーザー hitoyozake
提出日時 2018-05-11 05:24:27
言語 Rust
(1.83.0 + proconio)
結果
AC  
実行時間 2 ms / 5,000 ms
コード長 2,021 bytes
コンパイル時間 12,564 ms
コンパイル使用メモリ 389,396 KB
実行使用メモリ 6,944 KB
最終ジャッジ日時 2024-07-01 09:00:30
合計ジャッジ時間 13,863 ms
ジャッジサーバーID
（参考情報） 		judge5 / judge3
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ファイルパターン 結果
other AC * 33
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: unnecessary parentheses around `while` condition
  --> src/main.rs:32:10
   |
32 |     while(queue.is_empty() == false){
   |          ^                         ^
   |
   = note: `#[warn(unused_parens)]` on by default
help: remove these parentheses
   |
32 -     while(queue.is_empty() == false){
32 +     while queue.is_empty() == false {
   |

warning: unnecessary parentheses around `match` scrutinee expression
  --> src/main.rs:34:15
   |
34 |          match(map.get(&current)){
   |               ^                 ^
   |
help: remove these parentheses
   |
34 -          match(map.get(&current)){
34 +          match map.get(&current){
   |

warning: unnecessary parentheses around `match` scrutinee expression
  --> src/main.rs:51:14
   |
51 |         match(map.get(&next)){
   |              ^              ^
   |
help: remove these parentheses
   |
51 -         match(map.get(&next)){
51 +         match map.get(&next){
   |

warning: unnecessary parentheses around `match` scrutinee expression
  --> src/main.rs:70:14
   |
70 |         match(map.get(&next)){
   |              ^              ^
   |
help: remove these parentheses
   |
70 -         match(map.get(&next)){
70 +         match map.get(&next){
   |

warning: unnecessary parentheses around `match` scrutinee expression
  --> src/main.rs:89:10
   |
89 |     match(map.get(&n)){
   |          ^           ^
   |
help: remove these parentheses
   |
89 -     match(map.get(&n)){
89 +     match map.get(&n){
   |

warning: unused variable: `x`
 --> src/main.rs:5:9
  |
5 |     let x = std::io::stdin().read_line(&mut buf);
  |         ^ help: if this is intentional, prefix it with an underscore: `_x`
  |
  = note: `#[warn(unused_variables)]` on by default

warning: unused variable: `i`
  --> src/main.rs:13:9
   |
13 |     for i in 0..16{
   |         ^ help: if this is intentional, prefix it with an underscore: `_i`

warning: value assigned to `current` is never read
  --> src/main.rs:27:13
   |
27 |     let mut cur

ソースコード

diff #
raw source code 

fn read_line()->String{
    let mut buf = String::new();

    let x = std::io::stdin().read_line(&mut buf);

    return buf;
}

fn get_bitcount(x:u32)->u32{
    let mut tmp = x;
    let mut count = 0;
    for i in 0..16{
        count += tmp % 2;

        tmp = tmp >> 1;
    }
    count
}

fn main() {
    let n = read_line().trim().parse::<u32>().unwrap();

    let mut queue: std::collections::VecDeque<u32> = std::collections::VecDeque::new();
    let mut map: std::collections::HashMap<u32,u32> = std::collections::HashMap::new();
    queue.push_front(1);
    let mut current:u32 = 1;
    let mut step:u32 = 0;

    map.insert(1, 1);

    while(queue.is_empty() == false){
        current = queue.pop_back().unwrap();
         match(map.get(&current)){
            Some(_found) =>{
                step = *_found;
            },
            _ => {
                // never reach
            },
        };
        if current == n{
            break;
        }

        let bitcount = get_bitcount(current);

        //get next
        let next = current + bitcount;
        let mut found = false;
        match(map.get(&next)){
            Some(_found) =>{
                found = true;
            },
            _ => {
                
            },
        };

        if found == false{
            map.insert(next, step+1);
                if next <= n {
                    queue.push_front(next);    
                }
        }

        let next = current - bitcount;
        let mut found = false;

        match(map.get(&next)){
            Some(_found) =>{
                found = true;
            },
            _ => {
            },
        };


        if found == false{
            map.insert(next, step+1);
                if next <= n {
                    queue.push_front(next);    
                }
        }
    }

    let mut r = -1;

    match(map.get(&n)){
        Some(_found)=>{
            r = *_found as i64;
        },
        _ =>{

        },
    };
    

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