結果
| 問題 |
No.3147 Parentheses Modification and Rotation (RM Ver.)
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2025-05-17 23:32:00 |
| 言語 | Rust (1.83.0 + proconio) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 2,798 bytes |
| コンパイル時間 | 16,205 ms |
| コンパイル使用メモリ | 381,256 KB |
| 実行使用メモリ | 7,848 KB |
| 最終ジャッジ日時 | 2025-05-17 23:32:19 |
| 合計ジャッジ時間 | 13,299 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 23 WA * 10 |
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), 0);
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}");
}