結果
問題 |
No.3147 Parentheses Modification and Rotation (RM Ver.)
|
ユーザー |
|
提出日時 | 2025-05-17 23:32:57 |
言語 | Rust (1.83.0 + proconio) |
結果 |
AC
|
実行時間 | 23 ms / 2,000 ms |
コード長 | 2,804 bytes |
コンパイル時間 | 14,075 ms |
コンパイル使用メモリ | 382,856 KB |
実行使用メモリ | 7,956 KB |
最終ジャッジ日時 | 2025-05-17 23:33:16 |
合計ジャッジ時間 | 16,306 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 33 |
ソースコード
fn getline() -> String { let mut ret = String::new(); std::io::stdin().read_line(&mut ret).ok().unwrap(); ret } // Segment Tree. This data structure is useful for fast folding on intervals of an array // whose elements are elements of monoid I. Note that constructing this tree requires the identity // element of I and the operation of I. // Verified by: yukicoder No. 2220 (https://yukicoder.me/submissions/841554) struct SegTree<I, BiOp> { n: usize, orign: usize, dat: Vec<I>, op: BiOp, e: I, } impl<I, BiOp> SegTree<I, BiOp> where BiOp: Fn(I, I) -> I, I: Copy { pub fn new(n_: usize, op: BiOp, e: I) -> Self { let mut n = 1; while n < n_ { n *= 2; } // n is a power of 2 SegTree {n: n, orign: n_, dat: vec![e; 2 * n - 1], op: op, e: e} } // ary[k] <- v pub fn update(&mut self, idx: usize, v: I) { debug_assert!(idx < self.orign); let mut k = idx + self.n - 1; self.dat[k] = v; while k > 0 { k = (k - 1) / 2; self.dat[k] = (self.op)(self.dat[2 * k + 1], self.dat[2 * k + 2]); } } // [a, b) (half-inclusive) // http://proc-cpuinfo.fixstars.com/2017/07/optimize-segment-tree/ #[allow(unused)] pub fn query(&self, rng: std::ops::Range<usize>) -> I { let (mut a, mut b) = (rng.start, rng.end); debug_assert!(a <= b); debug_assert!(b <= self.orign); let mut left = self.e; let mut right = self.e; a += self.n - 1; b += self.n - 1; while a < b { if (a & 1) == 0 { left = (self.op)(left, self.dat[a]); } if (b & 1) == 0 { right = (self.op)(self.dat[b - 1], right); } a = a / 2; b = (b - 1) / 2; } (self.op)(left, right) } } fn main() { getline(); let s = getline().trim().chars().collect::<Vec<_>>(); let n = s.len(); let line = getline().trim().split_whitespace() .map(|x| x.parse::<i64>().unwrap()) .collect::<Vec<_>>(); let r = line[0]; let m = line[1]; if n % 2 != 0 { println!("-1"); return; } let mut acc = vec![0; 2 * n + 1]; for i in 0..2 * n { let d = if s[i % n] == '(' { 1 } else { -1 }; acc[i + 1] = acc[i] + d; } let mut st = SegTree::new(2 * n + 1, |x, y| x.min(y), 1 << 60); for i in 0..2 * n + 1 { st.update(i, acc[i]); } let mut ans = n as i64 * m; for i in 1..=n { let delta = acc[i + n] - acc[i]; let min = st.query(i..i + n + 1) - acc[i]; let k = (-min + 1) / 2; let mo = 2 * k + delta / 2; ans = ans.min(mo * m + r * (n - i) as i64); } println!("{ans}"); }