結果
問題 | No.2710 How many more? |
ユーザー | naut3 |
提出日時 | 2024-03-31 14:06:21 |
言語 | Rust (1.77.0 + proconio) |
結果 |
AC
|
実行時間 | 73 ms / 2,000 ms |
コード長 | 3,995 bytes |
コンパイル時間 | 13,259 ms |
コンパイル使用メモリ | 401,476 KB |
実行使用メモリ | 9,096 KB |
最終ジャッジ日時 | 2024-09-30 18:57:52 |
合計ジャッジ時間 | 15,665 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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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
6,816 KB |
testcase_01 | AC | 1 ms
6,820 KB |
testcase_02 | AC | 51 ms
6,820 KB |
testcase_03 | AC | 37 ms
6,820 KB |
testcase_04 | AC | 37 ms
8,384 KB |
testcase_05 | AC | 22 ms
6,816 KB |
testcase_06 | AC | 32 ms
7,516 KB |
testcase_07 | AC | 14 ms
6,820 KB |
testcase_08 | AC | 16 ms
6,820 KB |
testcase_09 | AC | 51 ms
7,276 KB |
testcase_10 | AC | 27 ms
6,820 KB |
testcase_11 | AC | 35 ms
6,816 KB |
testcase_12 | AC | 65 ms
8,320 KB |
testcase_13 | AC | 71 ms
9,092 KB |
testcase_14 | AC | 69 ms
8,968 KB |
testcase_15 | AC | 69 ms
8,968 KB |
testcase_16 | AC | 73 ms
9,096 KB |
testcase_17 | AC | 72 ms
8,836 KB |
testcase_18 | AC | 0 ms
6,820 KB |
ソースコード
#![allow(non_snake_case, unused_imports, unused_must_use)] use std::io::{self, prelude::*}; use std::str; fn main() { let (stdin, stdout) = (io::stdin(), io::stdout()); let mut scan = Scanner::new(stdin.lock()); let mut out = io::BufWriter::new(stdout.lock()); macro_rules! input { ($T: ty) => { scan.token::<$T>() }; ($T: ty, $N: expr) => { (0..$N).map(|_| scan.token::<$T>()).collect::<Vec<_>>() }; } let N = input!(usize); let Q = input!(usize); let A = input!(usize, N); let (z, zi) = coordinate_compression(&A); let mut bit = BinaryIndexedTree::new(z.len()); for &a in A.iter() { let &p = zi.get(&a).unwrap(); bit.add(p, 1isize); } for _ in 0..Q { let X = input!(usize) - 1; let Y = input!(usize) - 1; let &zx = zi.get(&A[X]).unwrap(); let &zy = zi.get(&A[Y]).unwrap(); let mut ans = 0; if zy + 1 < z.len() && zy + 1 < zx { ans += bit.sum(zy + 1..zx); } writeln!(out, "{}", ans); } } pub struct BinaryIndexedTree<T> { tree: Vec<T>, } impl<T: Default + Clone + Copy + std::ops::AddAssign + std::ops::Sub<Output = T>> BinaryIndexedTree<T> { /// self = [0; size] pub fn new(size: usize) -> Self { return Self { tree: vec![T::default(); size + 1], }; } /// self[i] <- self[i] + w pub fn add(&mut self, i: usize, w: T) { self._inner_add(i + 1, w); } /// return Σ_{j ∈ [0, i]} self[j] pub fn prefix_sum(&self, i: usize) -> T { self._inner_sum(i + 1) } /// return Σ_{j ∈ range} self[j] pub fn sum<R: std::ops::RangeBounds<usize>>(&self, range: R) -> T { let left = match range.start_bound() { std::ops::Bound::Included(&l) => l, std::ops::Bound::Excluded(&l) => l + 1, std::ops::Bound::Unbounded => 0, }; let right = match range.end_bound() { std::ops::Bound::Included(&r) => r, std::ops::Bound::Excluded(&r) => r - 1, std::ops::Bound::Unbounded => self.tree.len() - 2, }; if left == 0 { return self.prefix_sum(right); } else { return self.prefix_sum(right) - self.prefix_sum(left - 1); } } fn _inner_add(&mut self, mut i: usize, w: T) { while i < self.tree.len() { self.tree[i] += w; i += i & i.wrapping_neg(); } } fn _inner_sum(&self, mut i: usize) -> T { let mut ret = T::default(); while i > 0 { ret += self.tree[i]; i -= i & i.wrapping_neg(); } return ret; } } pub fn coordinate_compression<T: std::cmp::Ord + Clone + Copy>( values: &[T], ) -> (Vec<T>, std::collections::BTreeMap<T, usize>) { let s: std::collections::BTreeSet<T> = values.iter().cloned().collect(); let z: Vec<T> = s.iter().cloned().collect(); let zinv: std::collections::BTreeMap<T, usize> = z.iter().enumerate().map(|(i, &v)| (v, i)).collect(); (z, zinv) } struct Scanner<R> { reader: R, buf_str: Vec<u8>, buf_iter: str::SplitWhitespace<'static>, } impl<R: BufRead> Scanner<R> { fn new(reader: R) -> Self { Self { reader, buf_str: vec![], buf_iter: "".split_whitespace(), } } fn token<T: str::FromStr>(&mut self) -> T { loop { if let Some(token) = self.buf_iter.next() { return token.parse().ok().expect("Failed parse"); } self.buf_str.clear(); self.reader .read_until(b'\n', &mut self.buf_str) .expect("Failed read"); self.buf_iter = unsafe { let slice = str::from_utf8_unchecked(&self.buf_str); std::mem::transmute(slice.split_whitespace()) } } } }