結果
問題 | No.493 とても長い数列と文字列(Long Long Sequence and a String) |
ユーザー | koba-e964 |
提出日時 | 2021-10-28 22:09:10 |
言語 | Rust (1.77.0 + proconio) |
結果 |
WA
|
実行時間 | - |
コード長 | 2,467 bytes |
コンパイル時間 | 12,114 ms |
コンパイル使用メモリ | 397,396 KB |
実行使用メモリ | 6,824 KB |
最終ジャッジ日時 | 2024-10-07 08:11:03 |
合計ジャッジ時間 | 14,324 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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テストケース
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testcase_117 | AC | 1 ms
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testcase_118 | WA | - |
ソースコード
#[allow(unused_imports)] use std::cmp::*; #[allow(unused_imports)] use std::collections::*; use std::io::Read; fn get_word() -> String { let stdin = std::io::stdin(); let mut stdin=stdin.lock(); let mut u8b: [u8; 1] = [0]; loop { let mut buf: Vec<u8> = Vec::with_capacity(16); loop { let res = stdin.read(&mut u8b); if res.unwrap_or(0) == 0 || u8b[0] <= b' ' { break; } else { buf.push(u8b[0]); } } if buf.len() >= 1 { let ret = String::from_utf8(buf).unwrap(); return ret; } } } #[allow(dead_code)] fn get<T: std::str::FromStr>() -> T { get_word().parse().ok().unwrap() } const MOD: i64 = 1_000_000_007; fn dfs(k: usize, l: i64, r: i64, len: &[i64]) -> (i64, i64) { if l == r { return (0, 1); } if k == 1 { return (1, 1); } assert!(r <= len[k]); assert!(l <= r); if (l, r) == (0, len[k]) { let mut a = 0; let mut b = 1; let mut v = k as i64 * k as i64; while v > 0 { let mut r = v % 10; a += r; if r == 0 { r = 10; } b = b * r % MOD; v /= 10; } let (c, d) = dfs(k - 1, 0, len[k - 1], len); a += 2 * c; b = b * d % MOD * d % MOD; return (a, b); } let mut a = 0; let mut b = 1; let mid1 = len[k - 1]; let mid2 = len[k] - len[k - 1]; if l < mid1 { let (c, d) = dfs(k - 1, l, min(r, mid1), &len); a += c; b = b * d % MOD; } if l < mid2 && r < mid1 { let s: Vec<_> = format!("{}", k * k).bytes().collect(); for i in max(l, mid1) - mid1..min(r, mid2) - mid1 { let v = s[i as usize] as i64; a += r; let v = if v == 0 { 10 } else { v }; b = b * v % MOD; } } if r > mid2 { let (c, d) = dfs(k - 1, max(l, mid2) - mid2, r - mid2, &len); a += c; b = b * d % MOD; } (a, b) } fn main() { let k: usize = get(); let l: i64 = get(); let r: i64 = get(); let mut len = vec![0; 62]; len[1] = 1; for i in 2..62 { len[i] = len[i - 1] * 2 + format!("{}", i * i).len() as i64; } let k = min(k, 61); if r > len[k] { println!("-1"); return; } let (a, b) = dfs(k, l - 1, r, &len); println!("{} {}", a, b); }