結果
問題 | No.1653 Squarefree |
ユーザー | fukafukatani |
提出日時 | 2021-08-22 21:20:00 |
言語 | Rust (1.77.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 2,177 bytes |
コンパイル時間 | 2,968 ms |
コンパイル使用メモリ | 157,848 KB |
実行使用メモリ | 26,328 KB |
最終ジャッジ日時 | 2023-08-06 17:22:20 |
合計ジャッジ時間 | 18,089 ms |
ジャッジサーバーID (参考情報) |
judge15 / judge13 |
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 | WA | - |
testcase_01 | AC | 60 ms
14,620 KB |
testcase_02 | AC | 61 ms
15,640 KB |
testcase_03 | AC | 58 ms
14,344 KB |
testcase_04 | AC | 61 ms
14,336 KB |
testcase_05 | AC | 62 ms
15,128 KB |
testcase_06 | AC | 61 ms
15,112 KB |
testcase_07 | AC | 61 ms
14,348 KB |
testcase_08 | AC | 61 ms
14,600 KB |
testcase_09 | AC | 61 ms
14,636 KB |
testcase_10 | AC | 61 ms
15,644 KB |
testcase_11 | AC | 402 ms
25,640 KB |
testcase_12 | AC | 404 ms
25,136 KB |
testcase_13 | AC | 556 ms
25,112 KB |
testcase_14 | AC | 558 ms
24,796 KB |
testcase_15 | AC | 568 ms
25,508 KB |
testcase_16 | AC | 560 ms
25,184 KB |
testcase_17 | AC | 560 ms
25,800 KB |
testcase_18 | AC | 571 ms
25,896 KB |
testcase_19 | AC | 560 ms
26,036 KB |
testcase_20 | AC | 561 ms
24,996 KB |
testcase_21 | AC | 562 ms
26,328 KB |
testcase_22 | AC | 562 ms
25,004 KB |
testcase_23 | AC | 557 ms
25,384 KB |
testcase_24 | AC | 561 ms
25,516 KB |
testcase_25 | AC | 559 ms
26,108 KB |
testcase_26 | AC | 556 ms
24,804 KB |
testcase_27 | AC | 563 ms
25,824 KB |
testcase_28 | AC | 553 ms
24,932 KB |
testcase_29 | AC | 564 ms
24,964 KB |
testcase_30 | AC | 560 ms
25,900 KB |
testcase_31 | AC | 562 ms
25,024 KB |
testcase_32 | AC | 562 ms
25,004 KB |
testcase_33 | AC | 559 ms
24,948 KB |
testcase_34 | AC | 562 ms
24,948 KB |
testcase_35 | AC | 564 ms
25,064 KB |
testcase_36 | AC | 58 ms
14,336 KB |
testcase_37 | AC | 59 ms
14,604 KB |
testcase_38 | AC | 58 ms
14,244 KB |
testcase_39 | AC | 59 ms
14,636 KB |
testcase_40 | AC | 59 ms
15,400 KB |
コンパイルメッセージ
warning: unused variable: `ng` --> Main.rs:35:22 | 35 | let (ok, ng) = binary_search(0, num + 1, |m| m * m <= num); | ^^ help: if this is intentional, prefix it with an underscore: `_ng` | = note: `#[warn(unused_variables)]` on by default warning: 1 warning emitted
ソースコード
fn main() { let v = read_vec::<i128>(); let (l, r) = (v[0], v[1]); let primes = get_primes(6000001); let mut flags = vec![true; (r - l) as usize + 1]; let mut numbers = (l..=r).collect::<Vec<_>>(); for p in primes { let mut cur = (l / p) * p; if cur < l { cur += p; } while cur <= r { let idx = (cur - l) as usize; let mut count = 0; while numbers[idx] % p == 0 { numbers[idx] /= p; count += 1; } if count >= 2 { flags[idx] = false; } cur += p; } } let mut ans = 0; for num in l..=r { if num == 1 { ans += 1; continue; } if flags[(num - l) as usize] { let (ok, ng) = binary_search(0, num + 1, |m| m * m <= num); if ok * ok != num { ans += 1; } } } println!("{}", ans); } type Input = i128; fn binary_search<F>(lb: Input, ub: Input, criterion: F) -> (Input, Input) where F: Fn(Input) -> bool, { assert_eq!(criterion(lb), true); assert_eq!(criterion(ub), false); let mut ok = lb; let mut ng = ub; while ng - ok > 1 { let mid = (ng + ok) / 2; if criterion(mid) { ok = mid; } else { ng = mid; } } (ok, ng) } fn read<T: std::str::FromStr>() -> T { let mut s = String::new(); std::io::stdin().read_line(&mut s).ok(); s.trim().parse().ok().unwrap() } fn read_vec<T: std::str::FromStr>() -> Vec<T> { read::<String>() .split_whitespace() .map(|e| e.parse().ok().unwrap()) .collect() } fn get_primes(n: i128) -> Vec<i128> { let mut is_prime = vec![true; n as usize + 1]; let mut primes = Vec::new(); is_prime[0] = false; is_prime[1] = false; for i in 2..n + 1 { if is_prime[i as usize] { primes.push(i); let mut j = 2 * i; while j <= n { is_prime[j as usize] = false; j += i; } } } primes }