結果
問題 | No.757 チャンパーノウン定数 (2) |
ユーザー | koba-e964 |
提出日時 | 2021-11-14 00:23:51 |
言語 | Rust (1.77.0 + proconio) |
結果 |
AC
|
実行時間 | 208 ms / 2,000 ms |
コード長 | 2,758 bytes |
コンパイル時間 | 13,124 ms |
コンパイル使用メモリ | 378,948 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-05-06 04:57:45 |
合計ジャッジ時間 | 15,700 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 1 ms
5,248 KB |
testcase_01 | AC | 1 ms
5,248 KB |
testcase_02 | AC | 1 ms
5,248 KB |
testcase_03 | AC | 1 ms
5,376 KB |
testcase_04 | AC | 0 ms
5,376 KB |
testcase_05 | AC | 1 ms
5,376 KB |
testcase_06 | AC | 1 ms
5,376 KB |
testcase_07 | AC | 1 ms
5,376 KB |
testcase_08 | AC | 0 ms
5,376 KB |
testcase_09 | AC | 1 ms
5,376 KB |
testcase_10 | AC | 1 ms
5,376 KB |
testcase_11 | AC | 0 ms
5,376 KB |
testcase_12 | AC | 0 ms
5,376 KB |
testcase_13 | AC | 1 ms
5,376 KB |
testcase_14 | AC | 1 ms
5,376 KB |
testcase_15 | AC | 0 ms
5,376 KB |
testcase_16 | AC | 1 ms
5,376 KB |
testcase_17 | AC | 1 ms
5,376 KB |
testcase_18 | AC | 1 ms
5,376 KB |
testcase_19 | AC | 1 ms
5,376 KB |
testcase_20 | AC | 1 ms
5,376 KB |
testcase_21 | AC | 1 ms
5,376 KB |
testcase_22 | AC | 1 ms
5,376 KB |
testcase_23 | AC | 0 ms
5,376 KB |
testcase_24 | AC | 1 ms
5,376 KB |
testcase_25 | AC | 1 ms
5,376 KB |
testcase_26 | AC | 1 ms
5,376 KB |
testcase_27 | AC | 1 ms
5,376 KB |
testcase_28 | AC | 68 ms
5,376 KB |
testcase_29 | AC | 38 ms
5,376 KB |
testcase_30 | AC | 2 ms
5,376 KB |
testcase_31 | AC | 5 ms
5,376 KB |
testcase_32 | AC | 1 ms
5,376 KB |
testcase_33 | AC | 19 ms
5,376 KB |
testcase_34 | AC | 20 ms
5,376 KB |
testcase_35 | AC | 4 ms
5,376 KB |
testcase_36 | AC | 3 ms
5,376 KB |
testcase_37 | AC | 39 ms
5,376 KB |
testcase_38 | AC | 59 ms
5,376 KB |
testcase_39 | AC | 74 ms
5,376 KB |
testcase_40 | AC | 56 ms
5,376 KB |
testcase_41 | AC | 56 ms
5,376 KB |
testcase_42 | AC | 208 ms
5,376 KB |
testcase_43 | AC | 68 ms
5,376 KB |
testcase_44 | AC | 64 ms
5,376 KB |
testcase_45 | AC | 81 ms
5,376 KB |
testcase_46 | AC | 104 ms
5,376 KB |
testcase_47 | AC | 73 ms
5,376 KB |
testcase_48 | AC | 120 ms
5,376 KB |
testcase_49 | AC | 74 ms
5,376 KB |
testcase_50 | AC | 1 ms
5,376 KB |
testcase_51 | AC | 1 ms
5,376 KB |
testcase_52 | AC | 1 ms
5,376 KB |
testcase_53 | AC | 1 ms
5,376 KB |
ソースコード
// https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8 macro_rules! input { ($($r:tt)*) => { let stdin = std::io::stdin(); let mut bytes = std::io::Read::bytes(std::io::BufReader::new(stdin.lock())); let mut next = move || -> String{ bytes.by_ref().map(|r|r.unwrap() as char) .skip_while(|c|c.is_whitespace()) .take_while(|c|!c.is_whitespace()) .collect() }; input_inner!{next, $($r)*} }; } macro_rules! input_inner { ($next:expr) => {}; ($next:expr,) => {}; ($next:expr, $var:ident : $t:tt $($r:tt)*) => { let $var = read_value!($next, $t); input_inner!{$next $($r)*} }; } macro_rules! read_value { ($next:expr, chars) => { read_value!($next, String).chars().collect::<Vec<char>>() }; ($next:expr, $t:ty) => ($next().parse::<$t>().expect("Parse error")); } // Finds sum_{1 <= l < b^x} |l|. None if the result is >= b^n. fn calc(b: i32, x: usize, n: usize) -> Option<Vec<i32>> { if x >= n + 1 { return None; } let mut ans = vec![0; n]; for i in (0..x).rev() { let mut c = (i + 1) as i32 * (b - 1); let mut pos = n - i; while pos > 0 && c > 0 { ans[pos - 1] += c; c = ans[pos - 1] / b; ans[pos - 1] %= b; pos -= 1; } if pos == 0 && c != 0 { return None; } } Some(ans) } // Tags: multi-precision fn main() { input! { b: i32, d: chars, } let n = d.len(); let d: Vec<i32> = d.into_iter().map(|x| (x as u8 - b'0') as _).collect(); let mut pass = 0; let mut fail = n + 1; while fail - pass > 1 { let mid = (pass + fail) / 2; let res = calc(b, mid, n); if res.is_some() && res.unwrap() < d { pass = mid; } else { fail = mid; } } let lt = calc(b, pass, n).unwrap(); let mut rem = d.clone(); let mut c = 0; for i in (0..n).rev() { c = c + rem[i] - lt[i]; let mut nc = 0; if c < 0 { c += b; nc -= 1; } rem[i] = c; c = nc; } // q = (rem - 1) / fail, r = (rem - 1) % fail // the (r+1)-st digit of (b^pass + q) is the answer. c = -1; for i in (0..n).rev() { c = rem[i] + c; let mut nc = 0; if c < 0 { c += b; nc -= 1; } rem[i] = c; c = nc; } c = 0; let mut quo = vec![0; n]; for i in 0..n { c = b * c + rem[i]; quo[i] = c / fail as i32; c %= fail as i32; } quo[n - fail] += 1; println!("{}", quo[n - fail + c as usize]); }