#[doc = " https://github.com/hatoo/competitive-rust-snippets"] #[allow(unused_imports)] use std::cmp::{max, min, Ordering}; #[allow(unused_imports)] use std::collections::{BTreeMap, BTreeSet, BinaryHeap, HashMap, HashSet, VecDeque}; #[allow(unused_imports)] use std::io::{stdin, stdout, BufWriter, Write}; #[allow(unused_imports)] use std::iter::FromIterator; #[macro_export] macro_rules ! chmax { ( $ x : expr , $ ( $ v : expr ) ,+ ) => { $ ( $ x = std :: cmp :: max ( $ x ,$ v ) ; ) + } ; } #[macro_export] macro_rules ! chmin { ( $ x : expr , $ ( $ v : expr ) ,+ ) => { $ ( $ x = std :: cmp :: min ( $ x ,$ v ) ; ) + } ; } #[macro_export] macro_rules ! max { ( $ x : expr ) => ( $ x ) ; ( $ x : expr , $ ( $ xs : expr ) ,+ ) => { std :: cmp :: max ( $ x , max ! ( $ ( $ xs ) ,+ ) ) } ; } #[macro_export] macro_rules ! min { ( $ x : expr ) => ( $ x ) ; ( $ x : expr , $ ( $ xs : expr ) ,+ ) => { std :: cmp :: min ( $ x , min ! ( $ ( $ xs ) ,+ ) ) } ; } #[macro_export] macro_rules ! dvec { ( $ t : expr ; $ len : expr ) => { vec ! [ $ t ; $ len ] } ; ( $ t : expr ; $ len : expr , $ ( $ rest : expr ) ,* ) => { vec ! [ dvec ! ( $ t ; $ ( $ rest ) ,* ) ; $ len ] } ; } #[allow(unused_macros)] macro_rules ! debug { ( $ ( $ a : expr ) ,* ) => { eprintln ! ( concat ! ( $ ( stringify ! ( $ a ) , " = {:?}, " ) ,* ) , $ ( $ a ) ,* ) ; } } #[macro_export] macro_rules ! input { ( source = $ s : expr , $ ( $ r : tt ) * ) => { let mut parser = Parser :: from_str ( $ s ) ; input_inner ! { parser , $ ( $ r ) * } } ; ( parser = $ parser : ident , $ ( $ r : tt ) * ) => { input_inner ! { $ parser , $ ( $ r ) * } } ; ( new_stdin_parser = $ parser : ident , $ ( $ r : tt ) * ) => { let stdin = std :: io :: stdin ( ) ; let reader = std :: io :: BufReader :: new ( stdin . lock ( ) ) ; let mut $ parser = Parser :: new ( reader ) ; input_inner ! { $ parser , $ ( $ r ) * } } ; ( $ ( $ r : tt ) * ) => { input ! { new_stdin_parser = parser , $ ( $ r ) * } } ; } #[macro_export] macro_rules ! input_inner { ( $ parser : ident ) => { } ; ( $ parser : ident , ) => { } ; ( $ parser : ident , $ var : ident : $ t : tt $ ( $ r : tt ) * ) => { let $ var = read_value ! ( $ parser , $ t ) ; input_inner ! { $ parser $ ( $ r ) * } } ; } #[macro_export] macro_rules ! read_value { ( $ parser : ident , ( $ ( $ t : tt ) ,* ) ) => { ( $ ( read_value ! ( $ parser , $ t ) ) ,* ) } ; ( $ parser : ident , [ $ t : tt ; $ len : expr ] ) => { ( 0 ..$ len ) . map ( | _ | read_value ! ( $ parser , $ t ) ) . collect ::< Vec < _ >> ( ) } ; ( $ parser : ident , chars ) => { read_value ! ( $ parser , String ) . chars ( ) . collect ::< Vec < char >> ( ) } ; ( $ parser : ident , usize1 ) => { read_value ! ( $ parser , usize ) - 1 } ; ( $ parser : ident , $ t : ty ) => { $ parser . next ::<$ t > ( ) . expect ( "Parse error" ) } ; } use std::io; use std::io::BufRead; use std::str; pub struct Parser { reader: R, buf: Vec, pos: usize, } impl Parser { pub fn from_str(s: &str) -> Parser { Parser { reader: io::empty(), buf: s.as_bytes().to_vec(), pos: 0, } } } impl Parser { pub fn new(reader: R) -> Parser { Parser { reader: reader, buf: vec![], pos: 0, } } pub fn update_buf(&mut self) { self.buf.clear(); self.pos = 0; loop { let (len, complete) = { let buf2 = self.reader.fill_buf().unwrap(); self.buf.extend_from_slice(buf2); let len = buf2.len(); if len == 0 { break; } (len, buf2[len - 1] <= 0x20) }; self.reader.consume(len); if complete { break; } } } pub fn next(&mut self) -> Result { loop { let mut begin = self.pos; while begin < self.buf.len() && (self.buf[begin] <= 0x20) { begin += 1; } let mut end = begin; while end < self.buf.len() && (self.buf[end] > 0x20) { end += 1; } if begin != self.buf.len() { self.pos = end; return str::from_utf8(&self.buf[begin..end]).unwrap().parse::(); } else { self.update_buf(); } } } } #[allow(unused_macros)] macro_rules ! debug { ( $ ( $ a : expr ) ,* ) => { eprintln ! ( concat ! ( $ ( stringify ! ( $ a ) , " = {:?}, " ) ,* ) , $ ( $ a ) ,* ) ; } } #[doc = " https://github.com/hatoo/competitive-rust-snippets"] const BIG_STACK_SIZE: bool = true; #[allow(dead_code)] fn main() { use std::thread; if BIG_STACK_SIZE { thread::Builder::new() .stack_size(32 * 1024 * 1024) .name("solve".into()) .spawn(solve) .unwrap() .join() .unwrap(); } else { solve(); } } fn solve() { let out = stdout(); let mut out = BufWriter::new(out.lock()); input!{ n:usize,k1:usize,k2:usize, q:usize, ab:[(i64,i64);q] } let mut tablecoord = vec![]; for i in 0..n { let i = i as i64; tablecoord.push(i*3); } let k1 = k1-1; let k2 = k2-1; let doorcoord = if k1 > k2 { tablecoord[k1]-1 } else { tablecoord[k1]+1 }; let mut tableadj = vec![vec![]; n]; tableadj[0].push(1); for i in 1..n-1 { tableadj[i].push(i-1); tableadj[i].push(i+1); } tableadj[n-1].push(n-2); let mut tabledist = vec![0;n]; for i in 0..n { tabledist[i] = i64::abs(tablecoord[i] - doorcoord); } let mut forbidcnt = vec![0; n]; let mut waitq = VecDeque::new(); let mut tablemain = skiplist::Skiplist::new(); for i in 0..n { tablemain.insert((tabledist[i], i)); } let mut tablesub = skiplist::Skiplist::new(); let mut events = BinaryHeap::new(); for i in 0..q { events.push((-1 * ab[i].0, true, i)); } let mut alloc = vec![1<<30; q]; loop { if events.is_empty() { break; } let evt = events.pop().unwrap(); let (t, b, man) = evt; let t = -1 * t; if !b { // leave let tbl = alloc[man]; // 戻す let x = (tabledist[tbl], tbl); if forbidcnt[tbl] == 0 { tablemain.insert(x); } else { tablesub.insert(x); } for &adj in &tableadj[tbl] { forbidcnt[adj] -= 1; if forbidcnt[adj] == 0 { let x = (tabledist[adj], adj); if tablesub.remove(&x) { tablemain.insert(x); } } } } else { // まず最初にウェイトキューに入れることにする // すでに待ってる人たちと同一に扱うため waitq.push_back(man); } while !tablemain.is_empty() && !waitq.is_empty() { let (_, tbl) = tablemain.pop().unwrap(); let man = waitq.pop_front().unwrap(); alloc[man] = tbl; // 帰るイベントを登録する // falseにすることで同時刻ならleaveを優先する let leave_t = t + ab[man].1; events.push((-1 * leave_t, false, man)); for &adj in &tableadj[tbl] { if forbidcnt[adj] == 0 { let x = (tabledist[adj], adj); if tablemain.remove(&x) { tablesub.insert(x); } } forbidcnt[adj] += 1; } } while !tablesub.is_empty() && !waitq.is_empty() { let (_, tbl) = tablesub.pop().unwrap(); let man = waitq.pop_front().unwrap(); alloc[man] = tbl; // 帰るイベントを登録する // falseにすることで同時刻ならleaveを優先する let leave_t = t + ab[man].1; events.push((-1 * leave_t, false, man)); for &adj in &tableadj[tbl] { if forbidcnt[adj] == 0 { let x = (tabledist[adj], adj); if tablemain.remove(&x) { tablesub.insert(x); } } forbidcnt[adj] += 1; } } } for i in 0..q { writeln!(out, "{}", alloc[i]+1); } } mod skiplist { use std; use std::collections::{BTreeMap, BTreeSet}; use std::rc::Rc; use std::cell::{Cell, RefCell}; // use std::ops::RangeBounds; use std::fmt; struct RandGen { x: u64, } impl RandGen { fn new(seed: u64) -> RandGen { RandGen { x: seed, } } fn next(&mut self) -> u64 { const a: u64 = 1103515245; const b: u64 = 12345; const m: u64 = 1<<32; self.x = (a*self.x+b)%m; self.x } } pub struct Skiplist { max_height: Option, left_sentinel: Rc>>, right_sentinel: Rc>>, rand_gen: RandGen, traverse_stat: Cell, connect_stat: Cell, } impl Skiplist { pub fn print_graph(&self) { for level in (0..self.height()).rev() { let mut line=vec![]; let mut cur = self.left_sentinel.clone(); loop { let next0 = cur.borrow().next[level].clone(); let next = next0.unwrap().clone(); if next.borrow().value.is_none() { break; } else { cur = next.clone(); let v = cur.borrow().value.clone().unwrap(); line.push(v); } } let mut ss = vec![]; for x in line { while ss.len() < x { ss.push("--".to_string()); } ss.push(format!("{:>02}", x)); } println!("{}",ss.connect(",")); } println!(""); } } impl Skiplist where T: std::cmp::Ord + fmt::Debug + Clone { pub fn new() -> Skiplist { let left_sentinel = Rc::new(RefCell::new(SkipNode::sentinel())); let right_sentinel = Rc::new(RefCell::new(SkipNode::sentinel())); let sentinel_height = left_sentinel.borrow().height(); for level in 0..sentinel_height { left_sentinel.borrow_mut().next[level] = Some(right_sentinel.clone()); right_sentinel.borrow_mut().prev[level] = Some(left_sentinel.clone()); } Skiplist { max_height: None, left_sentinel: left_sentinel, right_sentinel: right_sentinel, rand_gen: RandGen::new(0), traverse_stat: Cell::new(0), connect_stat: Cell::new(0), } } fn height(&self) -> usize { self.max_height.unwrap_or(33) } fn pick_height(&mut self) -> usize { let z = self.rand_gen.next(); let mut k = 0; let mut m = 1; while z&m!=0 { k+=1; m<<=1; } k+1 } pub fn insert(&mut self, x: T) -> bool { let mut paths = self.traverse(&x); // println!("insert {:?}: {:?}", x, &paths); if !paths.is_empty() { let next0 = paths[0].borrow().next[0].clone(); let next = next0.unwrap(); let found = next.borrow().value.as_ref() == Some(&x); if found { return false; } } let new_height = self.pick_height(); self.max_height = Some(std::cmp::max(self.max_height.unwrap_or(0), new_height)); while paths.len() < new_height { paths.push(self.left_sentinel.clone()); } let new_node = Rc::new(RefCell::new(SkipNode::new(x, new_height))); for level in 0..new_height { let prev = &paths[level]; self.connect_stat.set(self.connect_stat.get()+1); SkipNode::connect(prev, &new_node, level); } true } fn find_node(&self, x: &T) -> Option>>> { let paths = self.traverse(x); // println!("find {:?}: {:?}", x, &paths); if paths.is_empty() { return None } let next0 = paths[0].borrow().next[0].clone(); let next = next0.unwrap(); if next.borrow().value.as_ref() == Some(x) { Some(next) } else { None } } pub fn find(&self, x: &T) -> bool { self.find_node(x).is_some() } pub fn reset_stat(&self) { self.traverse_stat.set(0); self.connect_stat.set(0); } pub fn show_stat(&self) { println!("traverse: {}", self.traverse_stat.get()); println!("connect: {}", self.connect_stat.get()); } fn traverse(&self, x: &T) -> Vec>>> { if self.height() == 0 { return vec![] } let mut cur = self.left_sentinel.clone(); let mut acc = vec![self.left_sentinel.clone(); self.height()]; let mut level = self.height() - 1; loop { if level == 0 { loop { acc[level] = cur.clone(); let next0 = cur.borrow().next[level].clone(); let next = next0.unwrap(); if next.borrow().value.is_none() || next.borrow().value.as_ref().unwrap() >= x { break; } else { cur = next.clone(); self.traverse_stat.set(self.traverse_stat.get()+1); } } break; } let next0 = cur.borrow().next[level].clone(); let next = next0.unwrap(); if next.borrow().value.is_none() || next.borrow().value.as_ref().unwrap() >= x { acc[level] = cur.clone(); level -= 1; continue; } else { cur = next; self.traverse_stat.set(self.traverse_stat.get()+1); } } acc } fn traverse_rev(&self, x: &T) -> Vec>>> { if self.height() == 0 { return vec![] } let mut cur = self.right_sentinel.clone(); let mut acc = vec![self.right_sentinel.clone(); self.height()]; let mut level = self.height() - 1; loop { if level == 0 { loop { acc[level] = cur.clone(); let next = cur.borrow().prev[level].clone().unwrap(); if next.borrow().value.is_none() || next.borrow().value.as_ref().unwrap() <= x { break; } else { cur = next.clone(); } } break; } let next = cur.borrow().prev[level].clone().unwrap(); if next.borrow().value.is_none() || next.borrow().value.as_ref().unwrap() <= x { acc[level] = cur.clone(); level -= 1; continue; } else { cur = next; } } acc } pub fn remove(&mut self, x: &T) -> bool { let node = self.find_node(x); if node.is_none() { return false } let node = node.unwrap(); node.borrow_mut().remove(); true } #[doc = "iterator in range [x,]"] pub fn ge_iter(&self, x: &T) -> Range { let f = self.traverse(x)[0].clone(); Range { forward: true, f: f, b: self.right_sentinel.clone(), } } #[doc = "iterator in range [,x]"] pub fn le_iter(&self, x: &T) -> Range { let b = self.traverse_rev(x)[0].clone(); Range { forward: false, f: self.left_sentinel.clone(), b: b, } } #[doc = "iterator in range [..]"] pub fn iter(&self) -> Range { Range { forward: true, f: self.left_sentinel.clone(), b: self.right_sentinel.clone(), } } pub fn is_empty(&self) -> bool { let mut it = self.iter(); let mut l = 0; for _ in it { l += 1; } l == 0 } #[doc = "O(n)"] pub fn pop(&mut self) -> Option { if self.is_empty() { None } else { let mut it = self.iter(); let x = it.next().unwrap(); self.remove(&x); Some(x) } } #[doc = "O(n)"] pub fn pop_back(&mut self) -> Option { if self.is_empty() { None } else { let mut it = self.iter().rev(); let x = it.next().unwrap(); self.remove(&x); Some(x) } } } pub struct Range { forward: bool, f: Rc>>, b: Rc>>, } impl Iterator for Range { type Item = T; fn next(&mut self) -> Option { let next0 = if self.forward { self.f.borrow().next[0].clone() } else { self.b.borrow().prev[0].clone() }; if next0.is_none() { return None } let next = next0.unwrap(); if self.forward { self.f = next; self.f.borrow().value.clone() } else { self.b = next; self.b.borrow().value.clone() } } } impl DoubleEndedIterator for Range { fn next_back(&mut self) -> Option { let next0 = if self.forward { self.b.borrow().prev[0].clone() } else { self.f.borrow().next[0].clone() }; if next0.is_none() { return None } let next = next0.unwrap(); if self.forward { self.b = next; self.b.borrow().value.clone() } else { self.f = next; self.f.borrow().value.clone() } } } impl fmt::Debug for Skiplist where T: fmt::Debug + Clone + std::cmp::Ord { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { let v: Vec = self.iter().collect(); writeln!(f, "{:?}", v); Ok(()) } } struct SkipNode { value: Option, prev: Vec>>>>, next: Vec>>>>, } impl fmt::Debug for SkipNode where T: fmt::Debug + std::cmp::Ord { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { writeln!(f, "{:?}, {:?}", self.value, self.height()); Ok(()) } } impl SkipNode where T: std::cmp::Ord + fmt::Debug { fn sentinel() -> SkipNode { SkipNode { value: None, prev: vec![None; 33], next: vec![None; 33], } } fn new(value: T, height: usize) -> SkipNode { SkipNode { value: Some(value), prev: vec![None; height], next: vec![None; height], } } fn height(&self) -> usize { self.next.len() } fn remove(&mut self) { for level in 0..self.height() { let prev_node = self.prev[level].clone().unwrap(); let next_node = self.next[level].clone().unwrap(); next_node.borrow_mut().prev[level] = Some(prev_node.clone()); prev_node.borrow_mut().next[level] = Some(next_node.clone()); } } // x -> z => x -> y -> z // z = some or none fn connect(x: &Rc>, y: &Rc>, level: usize) { let x_next = x.borrow().next[level].clone().unwrap(); x.borrow_mut().next[level] = Some(y.clone()); y.borrow_mut().prev[level] = Some(x.clone()); y.borrow_mut().next[level] = Some(x_next.clone()); x_next.borrow_mut().prev[level] = Some(y.clone()); } } use std::collections::HashMap; pub struct Multiset { sl: Skiplist, counting: HashMap, } impl Multiset where T: Ord + fmt::Debug + Clone + std::hash::Hash { pub fn new() -> Multiset { Multiset { sl: Skiplist::new(), counting: HashMap::new(), } } pub fn insert(&mut self, x: T) { self.sl.insert(x.clone()); *self.counting.entry(x).or_insert(0) += 1; } pub fn counting(&self, x: &T) -> usize { self.counting.get(x).cloned().unwrap_or(0) } pub fn remove(&mut self, x: &T) -> bool { let cnt = self.counting(x); if cnt == 0 { return false } if cnt >= 2 { *self.counting.get_mut(x).unwrap() -= 1; } else if cnt == 1 { self.counting.remove(x); self.sl.remove(x); } return true } pub fn unwrap(&self) -> &Skiplist { &self.sl } } }