結果
| 問題 |
No.1008 Bench Craftsman
|
| ユーザー |
 akiradeveloper
|
| 提出日時 | 2020-03-07 15:32:05 |
| 言語 | Rust (1.83.0 + proconio) |
| 結果 |
RE
|
| 実行時間 | - |
| コード長 | 10,018 bytes |
| コンパイル時間 | 12,488 ms |
| コンパイル使用メモリ | 379,572 KB |
| 実行使用メモリ | 7,040 KB |
| 最終ジャッジ日時 | 2024-10-14 15:44:59 |
| 合計ジャッジ時間 | 14,571 ms |
|
ジャッジサーバーID （参考情報） |
judge4 / judge3 |
（要ログイン）
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 6 RE * 21 |
コンパイルメッセージ
warning: unused variable: `y`
--> src/main.rs:220:31
|
220 | pub fn upper_bound(&self, y: i64) -> i64 {
| ^ help: if this is intentional, prefix it with an underscore: `_y`
|
= note: `#[warn(unused_variables)]` on by default
warning: unused variable: `b`
--> src/main.rs:244:13
|
244 | let b = line.b;
| ^ help: if this is intentional, prefix it with an underscore: `_b`
warning: field `n` is never read
--> src/main.rs:225:5
|
224 | struct Imosu1d {
| ------- field in this struct
225 | n: usize,
| ^
|
= note: `#[warn(dead_code)]` on by default
warning: unused `Result` that must be used
--> src/main.rs:134:9
|
134 | writeln!(out,"-1");
| ^^^^^^^^^^^^^^^^^^
|
= note: this `Result` may be an `Err` variant, which should be handled
= note: `#[warn(unused_must_use)]` on by default
= note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
warning: unused `Result` that must be used
--> src/main.rs:150:9
|
150 | writeln!(out,"0");
| ^^^^^^^^^^^^^^^^^
|
= note: this `Result` may be an `Err` variant, which should be handled
= note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
warning: unused `Result` that must be used
--> src/main.rs:182:5
|
182 | writeln!(out,"{}",r);
| ^^^^^^^^^^^^^^^^^^^^
|
= note: this `Result` may be an `Err` variant, which should be handled
= note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
warning: variable `L` should have a snake case name
--> src/main.rs:253:13
|
253 | let L = r - (l+1);
| ^ help: convert the identifier to snake case: `l`
|
= note: `#[warn(non_snake_case)]` on by default
ソースコード
#[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::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 ] } ; }
#[macro_export]
macro_rules ! cfor { ( ; $ ( $ rest : tt ) * ) => { cfor ! ( ( ) ; $ ( $ rest ) * ) } ; ( $ ( $ init : stmt ) ,+; ; $ ( $ rest : tt ) * ) => { cfor ! ( $ ( $ init ) ,+; ! false ; $ ( $ rest ) * ) } ; ( $ ( $ init : stmt ) ,+; $ cond : expr ; ; $ body : block ) => { cfor ! { $ ( $ init ) ,+; $ cond ; ( ) ; $ body } } ; ( $ ( $ init : stmt ) ,+; $ cond : expr ; $ ( $ step : expr ) ,+; $ body : block ) => { { $ ( $ init ; ) + while $ cond { let mut _first = true ; let mut _continue = false ; loop { if ! _first { _continue = true ; break } _first = false ; $ body } if ! _continue { break } $ ( $ step ; ) + } } } ; }
#[doc = " main"]
#[allow(unused_imports)]
use std::io::{stdin, stdout, BufWriter, Write};
#[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<R> {
reader: R,
buf: Vec<u8>,
pos: usize,
}
impl Parser<io::Empty> {
pub fn from_str(s: &str) -> Parser<io::Empty> {
Parser {
reader: io::empty(),
buf: s.as_bytes().to_vec(),
pos: 0,
}
}
}
impl<R: BufRead> Parser<R> {
pub fn new(reader: R) -> Parser<R> {
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<T: str::FromStr>(&mut self) -> Result<T, T::Err> {
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::<T>();
} 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,m:usize,
a:[i64;n],
xw:[(usize,i64);m],
}
// c=infでもだめか？
let mut rem = a.clone();
for i in 0..m {
let (x,w) = xw[i];
let x = x-1;
rem[x] -= w;
}
let mut ok = true;
for i in 0..n {
if rem[i] <= 0 {
ok = false;
}
}
if !ok {
writeln!(out,"-1");
return
}
// c=0でおっけーか？
let mut tot = 0;
for i in 0..m {
tot += xw[i].1;
}
let mut ok = true;
for i in 0..n {
if tot >= a[i] {
ok = false
}
}
if ok {
writeln!(out,"0");
return
}
let qu = |c:i64| {
let mut imos = Imosu1d::new(n);
for i in 0..m {
let (x,w) = xw[i];
let x = x-1;
let leftline = ArithSeq::from_point(x as i64, w, c);
let r = max(0, leftline.lower_bound(0)) as usize;
imos.add_line(r, x, leftline);
let rightline = ArithSeq::from_point(x as i64, w, -c);
let r = min(n as i64, rightline.lower_bound(0)) as usize;
imos.add_line(x, r, rightline);
}
imos.build();
let mut ok = true;
for i in 0..n {
let sum = imos.get(i);
if sum >= a[i] {
ok = false;
}
}
ok
};
let mut bs = BinarySearch {
lower: 1,
upper: 1<<60,
p: qu,
};
let r = bs.lower_bound();
writeln!(out,"{}",r);
}
pub struct ArithSeq {
pub a: i64,
pub b: i64,
}
impl ArithSeq {
#[doc = "y=ax+b"]
pub fn new(a: i64, b: i64) -> Self {
ArithSeq { a: a, b: b }
}
pub fn from_point(x0: i64, y0: i64, a: i64) -> Self {
let b = y0 - a * x0;
Self::new(a, b)
}
pub fn y(&self, x: i64) -> i64 {
self.a * x + self.b
}
#[doc = "x such that f(x) >= y and f(x-1) < y"]
pub fn lower_bound(&self, y: i64) -> i64 {
assert!(self.a != 0);
let a = self.a;
let b = self.b;
if a > 0 {
let mut x = y - b;
if x >= 0 {
x += a - 1;
} else {
}
let x = x / a;
x
} else {
let y = 2 * b - y;
let mirror = Self::new(-a, b);
mirror.lower_bound(y)
}
}
#[doc = "x such that f(x) < y and f(x+1) >= y"]
pub fn upper_bound(&self, y: i64) -> i64 {
unimplemented!()
}
}
struct Imosu1d {
n: usize,
dp1: Vec<i64>,
dp2: Vec<i64>,
dp3: Vec<i64>,
}
impl Imosu1d {
pub fn new(n: usize) -> Imosu1d {
Imosu1d {
n: n,
dp1: vec![0;n+1],
dp2: vec![0;n+1],
dp3: vec![0;n+1],
}
}
#[doc = "y=ax+b"]
pub fn add_line(&mut self, l: usize, r: usize, line: ArithSeq) {
if l >= r { return; }
let a = line.a;
let b = line.b;
let y = line.y(l as i64);
self.dp1[l] += y;
self.dp1[r] += -y;
self.dp2[l+1] += a;
self.dp2[r] += -a;
let L = r - (l+1);
self.dp3[r] += -a * L as i64;
}
pub fn get(&self, k: usize) -> i64 {
self.dp1[k]
}
fn sweep(dp: &mut [i64]) {
let mut cur = 0;
for i in 0..dp.len() {
cur += dp[i];
dp[i] = cur;
}
}
pub fn build(&mut self) {
let n = self.dp1.len();
Self::sweep(&mut self.dp1);
Self::sweep(&mut self.dp2);
for i in 0..n {
self.dp2[i] += self.dp3[i];
}
Self::sweep(&mut self.dp2);
for i in 0..n {
self.dp1[i] += self.dp2[i];
}
}
}
#[doc = "lower,upper are inclusive range"]
pub struct BinarySearch<F> {
pub p: F,
pub lower: i64,
pub upper: i64,
}
impl<F: FnMut(i64) -> bool> BinarySearch<F> {
#[doc = "O(log(upper-lower))"]
pub fn lower_bound(&mut self) -> i64 {
let lower = self.lower;
let upper = self.upper;
assert!(lower <= upper);
let mut lb = lower - 1;
let mut ub = upper + 1;
while ub - lb > 1 {
let mid = (lb + ub) / 2;
let ok = (self.p)(mid);
if ok {
ub = mid;
} else {
lb = mid;
}
}
ub
}
}