結果

問題 No.1996 <><
ユーザー phsplsphspls
提出日時 2022-09-27 12:40:21
言語 Rust
(1.77.0)
結果
AC  
実行時間 684 ms / 2,000 ms
コード長 3,063 bytes
コンパイル時間 2,222 ms
コンパイル使用メモリ 172,000 KB
実行使用メモリ 49,976 KB
最終ジャッジ日時 2023-08-24 03:48:33
合計ジャッジ時間 11,124 ms
ジャッジサーバーID
（参考情報） 		judge15 / judge11
このコードへのチャレンジ
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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
4,376 KB
testcase_01 AC 1 ms
4,376 KB
testcase_02 AC 1 ms
4,380 KB
testcase_03 AC 1 ms
4,380 KB
testcase_04 AC 1 ms
4,376 KB
testcase_05 AC 1 ms
4,376 KB
testcase_06 AC 1 ms
4,376 KB
testcase_07 AC 1 ms
4,376 KB
testcase_08 AC 1 ms
4,380 KB
testcase_09 AC 1 ms
4,380 KB
testcase_10 AC 1 ms
4,376 KB
testcase_11 AC 253 ms
25,956 KB
testcase_12 AC 543 ms
49,976 KB
testcase_13 AC 684 ms
49,960 KB
testcase_14 AC 644 ms
48,332 KB
testcase_15 AC 573 ms
43,908 KB
testcase_16 AC 464 ms
38,380 KB
testcase_17 AC 572 ms
44,664 KB
testcase_18 AC 317 ms
29,112 KB
testcase_19 AC 381 ms
31,216 KB
testcase_20 AC 348 ms
28,788 KB
testcase_21 AC 490 ms
40,196 KB
testcase_22 AC 574 ms
43,380 KB
testcase_23 AC 12 ms
4,380 KB
testcase_24 AC 321 ms
31,724 KB
testcase_25 AC 136 ms
12,668 KB
testcase_26 AC 257 ms
24,352 KB
testcase_27 AC 32 ms
6,696 KB
testcase_28 AC 1 ms
4,376 KB
testcase_29 AC 118 ms
10,600 KB
testcase_30 AC 4 ms
4,380 KB
testcase_31 AC 41 ms
8,016 KB
testcase_32 AC 2 ms
4,376 KB
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コンパイルメッセージ
warning: field `orgn` is never read
 --> Main.rs:8:5
  |
6 | struct SegmentTree<F, T> {
  |        ----------- field in this struct
7 |     n: usize,
8 |     orgn: usize,
  |     ^^^^
  |
  = note: `SegmentTree` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
  = note: `#[warn(dead_code)]` on by default

warning: associated function `find_closed` is never used
  --> Main.rs:30:8
   |
30 |     fn find_closed(&self, l: usize, r: usize) -> T {
   |        ^^^^^^^^^^^

warning: 2 warnings emitted

ソースコード

diff # 

use std::collections::{BTreeSet, HashMap};

const MOD: usize = 1e9 as usize + 7;

#[derive(Debug, Clone)]
struct SegmentTree<F, T> {
    n: usize,
    orgn: usize,
    unit: T,
    mem: Vec<T>,
    operator: F
}

impl<F, T> SegmentTree<F, T> where
T: std::fmt::Debug + Copy,
F: Fn(T, T) -> T
{
    fn new(n: usize, unit: T, operator: F) -> Self {
        let mut size = 1usize;
        while size < n { size *= 2; }
        Self {
            n: size,
            orgn: n,
            unit: unit,
            mem: vec![unit; size*2-1],
            operator: operator,
        }
    }

    fn find_closed(&self, l: usize, r: usize) -> T {
        self.find(l, r+1)
    }

    fn find(&self, l: usize, r: usize) -> T {
        self._find(l, r, 0, 0, self.n)
    }

    fn set(&mut self, pos: usize, val: T) {
        let mut pos = pos + self.n - 1;
        self.mem[pos] = val;
        while pos > 0 {
            pos = self._parent(pos);
            self.mem[pos] = (self.operator)(self.mem[self._left(pos)], self.mem[self._right(pos)]);
        }
    }

    fn get(&mut self, pos: usize) -> T {
        self.mem[pos + self.n - 1]
    }

    fn _find(&self, a: usize, b: usize, nodenum: usize, l: usize, r: usize) -> T {
        if r <= a || b <= l {
            return self.unit;
        } else if a <= l && r <= b {
            return self.mem[nodenum];
        }
        let left = self._find(a, b, self._left(nodenum), l, (l+r)/2);
        let right = self._find(a, b, self._right(nodenum), (l+r)/2, r);
        (self.operator)(left, right)
    }
    fn _left(&self, k: usize) -> usize {
        2*k+1
    }
    fn _right(&self, k: usize) -> usize {
        2*k+2
    }
    fn _parent(&self, k: usize) -> usize {
        (k-1)/2
    }
}

fn main() {
    let mut nk = String::new();
    std::io::stdin().read_line(&mut nk).ok();
    let nk: Vec<usize> = nk.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
    let n = nk[0];
    let k = nk[1];
    let mut a = String::new();
    std::io::stdin().read_line(&mut a).ok();
    let a: Vec<usize> = a.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    let s = s.trim().chars().collect::<Vec<_>>();

    let aset = a.iter().copied().collect::<BTreeSet<usize>>();
    let mut amap = HashMap::new();
    for (i, &v) in aset.iter().enumerate() {
        amap.insert(v, i);
    }
    let mut segtrees = vec![SegmentTree::new(aset.len(), 0usize, |x, y| x + y); k+1];
    for i in 0..n {
        let aidx = *amap.get(&a[i]).unwrap();
        let cur = segtrees[1].get(aidx);
        segtrees[0].set(aidx, cur+1);
        for j in 0..k {
            let left = if s[j] == '>' { aidx+1 } else { 0 };
            let right = if s[j] == '>' { aset.len() } else { aidx };
            let addval = segtrees[j].find(left, right);
            let current = segtrees[j+1].get(aidx);
            segtrees[j+1].set(aidx, (current + addval) % MOD);
        }
    }
    println!("{}", segtrees[k].find(0, aset.len()) % MOD);
}
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