Submission #1690118
Source Code Expand
#![allow(unused_imports, unused_variables, dead_code)]
use std::io::*;
use std::fmt::*;
use std::str::*;
use std::cmp::*;
use std::collections::*;
trait InputValue {
fn parse(s: &str) -> Self;
}
fn read<T: InputValue>() -> T {
let mut buf = String::new();
let _ = stdin().read_line(&mut buf);
T::parse(&buf.trim())
}
fn readnc<T: InputValue>() -> Vec<T> {
let mut vec = vec![];
let line: String = read();
for token in line.split_whitespace() {
vec.push(T::parse(token));
}
vec
}
fn readn<T: InputValue>(n: usize) -> Vec<T> {
let mut vec = vec![];
for _ in 0..n {
vec.push(read());
}
vec
}
macro_rules! parse_single_value {
($($t:ty),*) => {
$(
impl InputValue for $t {
fn parse(s: &str) -> $t { s.parse().unwrap() }
}
)*
}
}
parse_single_value!(i32, i64, f32, f64, usize, String);
macro_rules! parse_tuple {
($($t:ident),*) => {
impl<$($t),*> InputValue for ($($t),*) where $($t: InputValue),* {
fn parse(s: &str) -> ($($t),*) {
let mut tokens = s.split_whitespace();
let t = ($($t::parse(tokens.next().unwrap())),*);
t
}
}
}
}
parse_tuple!(A, B, C, D);
// ===
trait Monoid {
fn mul(&self, Self) -> Self;
fn one() -> Self;
}
struct SegmentTree<T> {
n: usize,
data: Vec<T>
}
impl<T: Monoid + Clone> SegmentTree<T> {
fn new(n: usize, initial: T) -> Self {
let vs = (n-1).next_power_of_two() << 1;
SegmentTree { n: n, data: vec![initial; vs] }
}
fn new_with(v: &Vec<T>) -> Self {
let vs = max(4, (v.len()-1).next_power_of_two() << 1);
let n = v.len();
let mut data: Vec<T> = vec![T::one(); vs];
let bottom = vs/2-1;
for i in 0..n {
data[bottom+i] = v[i].clone();
}
for i in (0..bottom).rev() {
data[i] = data[i*2+1].mul(data[i*2+2].clone());
}
SegmentTree { n: v.len(), data: data }
}
fn change(&mut self, idx: usize, new_value: T) {
let mut pos = self.data.len() / 2 - 1 + idx;
self.data[pos] = new_value;
while pos >= 1 {
let to = (pos - 1) / 2;
self.data[to] = self.data[to*2+1].mul(self.data[to*2+2].clone());
pos = to;
}
}
fn range(&self, l: usize, r: usize) -> T {
self.range2(l, r, 0, 0, self.data.len() / 2)
}
fn range2(&self, l: usize, r: usize, idx: usize, segl: usize, segr: usize) -> T {
if r <= segl || segr <= l {
return T::one()
}
if l <= segl && segr <= r {
return self.data[idx].clone()
}
let med = (segl + segr) / 2;
self.range2(l, r, idx*2+1, segl, med).mul(self.range2(l, r, idx*2+2, med, segr))
}
}
// ===
#[derive(Clone, Debug, Copy)]
struct I64(i64);
impl Monoid for I64 {
fn mul(&self, other: Self) -> Self {
if self.0 < other.0 { I64(self.0) } else { I64(other.0) }
}
fn one() -> Self { I64(1e15 as i64) }
}
// ===
fn abs(a: usize, b: usize) -> i64 {
(if a < b {
b - a
} else {
a - b
}) as i64
}
fn main() {
let (n, q, mut a, mut b): (usize, usize, usize, usize) = read();
a -= 1;
b -= 1;
let mut x: Vec<usize> = readnc();
for i in 0..q {
x[i] -= 1;
}
let mut last = a;
let mut left = SegmentTree::new(n+10, I64::one());
let mut right = SegmentTree::new(n+10, I64::one());
for i in 0..n {
let lcost = i as i64;
let rcost = (n - 1 - i) as i64;
left.change(i, I64(abs(b, i) + lcost));
right.change(i, I64(abs(b, i) + rcost));
}
let mut add_all = 0;
let mut dp: Vec<i64> = vec![0; n];
for i in 0..n {
dp[i] = abs(b, i);
}
let mut add_all = 0;
for i in 0..q {
let add = abs(last, x[i]);
let tlast = dp[last] + add_all + add;
let mut tt = I64::one().0;
let lcost = x[i] as i64;
let rcost = (n - 1 - x[i]) as i64;
tt = min(tt, left.range(x[i], n).0 - lcost + add_all);
tt = min(tt, right.range(0, x[i]+1).0 - rcost + add_all);
add_all += add;
dp[last] = min(tt, tlast) - add_all;
let lcost = last as i64;
let rcost = (n - 1 - last) as i64;
left.change(last, I64(dp[last] + lcost));
right.change(last, I64(dp[last] + rcost));
// println!("{:?} {}", dp, add_all);
last = x[i];
}
let mut best = I64::one().0;
for i in 0..n {
best = min(best, dp[i] + add_all);
}
println!("{}", best);
}
Submission Info
Submission Time |
|
Task |
F - Many Moves |
User |
hamadu |
Language |
Rust (1.15.1) |
Score |
900 |
Code Size |
4808 Byte |
Status |
AC |
Exec Time |
186 ms |
Memory |
17392 KB |
Compile Error
warning: variable does not need to be mutable, #[warn(unused_mut)] on by default
--> ./Main.rs:162:9
|
162 | let mut add_all = 0;
| ^^^^^^^^^^^
Judge Result
Set Name |
Sample |
All |
Score / Max Score |
0 / 0 |
900 / 900 |
Status |
|
|
Set Name |
Test Cases |
Sample |
example0, example1, example2, example3 |
All |
example0, example1, example2, example3, flower0, flower1, flower2, flower3, flower4, flower5, flower6, flower7, flower8, flower9, maxrand0, maxrand1, maxrand2, maxrand3, maxrand4, maxrand5, maxrand6, maxrand7, maxrand8, maxrand9, smallrand0, smallrand1, smallrand2, smallrand3, smallrand4, smallrand5, smallrand6, smallrand7, smallrand8, smallrand9 |
Case Name |
Status |
Exec Time |
Memory |
example0 |
AC |
2 ms |
4352 KB |
example1 |
AC |
2 ms |
4352 KB |
example2 |
AC |
2 ms |
4352 KB |
example3 |
AC |
2 ms |
4352 KB |
flower0 |
AC |
163 ms |
17392 KB |
flower1 |
AC |
164 ms |
17392 KB |
flower2 |
AC |
163 ms |
17392 KB |
flower3 |
AC |
163 ms |
17392 KB |
flower4 |
AC |
162 ms |
17392 KB |
flower5 |
AC |
162 ms |
17392 KB |
flower6 |
AC |
164 ms |
17392 KB |
flower7 |
AC |
163 ms |
17392 KB |
flower8 |
AC |
164 ms |
17392 KB |
flower9 |
AC |
164 ms |
17392 KB |
maxrand0 |
AC |
186 ms |
17136 KB |
maxrand1 |
AC |
167 ms |
17136 KB |
maxrand2 |
AC |
170 ms |
17136 KB |
maxrand3 |
AC |
169 ms |
17136 KB |
maxrand4 |
AC |
176 ms |
17136 KB |
maxrand5 |
AC |
170 ms |
17136 KB |
maxrand6 |
AC |
170 ms |
17136 KB |
maxrand7 |
AC |
168 ms |
17136 KB |
maxrand8 |
AC |
171 ms |
17136 KB |
maxrand9 |
AC |
167 ms |
17136 KB |
smallrand0 |
AC |
2 ms |
4352 KB |
smallrand1 |
AC |
2 ms |
4352 KB |
smallrand2 |
AC |
2 ms |
4352 KB |
smallrand3 |
AC |
2 ms |
4352 KB |
smallrand4 |
AC |
2 ms |
4352 KB |
smallrand5 |
AC |
2 ms |
4352 KB |
smallrand6 |
AC |
2 ms |
4352 KB |
smallrand7 |
AC |
2 ms |
4352 KB |
smallrand8 |
AC |
2 ms |
4352 KB |
smallrand9 |
AC |
2 ms |
4352 KB |