CSES - Datatähti 2025 alku - Results
Submission details
Task:Robotti
Sender:villsukka
Submission time:2024-10-28 21:47:08 +0200
Language:Rust (2021)
Status:READY
Result:0
Feedback
groupverdictscore
#10
#20
Test results
testverdicttimegroup
#1ACCEPTED0.00 s1, 2details
#20.00 s1, 2details
#30.00 s1, 2details
#4ACCEPTED0.00 s1, 2details
#50.00 s1, 2details
#60.00 s1, 2details
#70.00 s1, 2details
#8ACCEPTED0.00 s1, 2details
#9ACCEPTED0.00 s1, 2details
#100.00 s1, 2details
#110.00 s1, 2details
#120.00 s2details
#130.00 s2details
#140.02 s2details
#150.00 s2details
#160.00 s2details
#170.00 s2details
#180.33 s2details
#19--2details
#20ACCEPTED0.00 s2details
#210.00 s2details
#220.00 s2details
#230.00 s2details
#240.00 s2details

Compiler report

warning: unused variable: `len`
  --> input/code.rs:43:9
   |
43 |     let len: usize = line.strip_suffix('\n').unwrap_or(&line).parse().unwrap();
   |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
   |
   = note: `#[warn(unused_variables)]` on by default

warning: 1 warning emitted

Code

use std::io::stdin;
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
enum RoomType {
Robot,
Coin,
Empty,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
enum Direction {
Left(i32),
Right(i32),
Same,
}
impl Direction {
fn get_inner(&self) -> i32 {
match self {
Direction::Left(x) => *x,
Direction::Right(x) => *x,
Direction::Same => 0,
}
}
}
impl RoomType {
fn from_char(c: char) -> Self {
use RoomType::*;
match c {
'R' => Robot,
'*' => Coin,
'.' => Empty,
_ => panic!("Should Be One Of The Above"),
}
}
}
fn main() {
let mut line = String::new();
stdin().read_line(&mut line).unwrap();
let len: usize = line.strip_suffix('\n').unwrap_or(&line).parse().unwrap();
line = "".to_string();
stdin().read_line(&mut line).unwrap();
let mut arr: Vec<RoomType> = line
.strip_suffix('\n')
.unwrap()
.chars()
.map(|c| RoomType::from_char(c))
.collect();
let mut startpos = arr
.iter()
.position(|x| *x == RoomType::Robot)
.expect("No robot");
let mut coin_count = 0;
let mut steps = 0;
let mut next_coin = find_next_coin(startpos, &arr);
while next_coin != Direction::Same {
coin_count += 1;
steps += next_coin.get_inner();
match next_coin {
Direction::Left(x) => startpos -= x as usize,
Direction::Right(x) => startpos += x as usize,
Direction::Same => unreachable!(),
};
arr[startpos] = RoomType::Empty;
next_coin = find_next_coin(startpos, &arr)
}
println!("{} {}", steps, coin_count);
}
fn find_next_coin(startpos: usize, arr: &Vec<RoomType>) -> Direction {
let mut rp = startpos.checked_add(1);
let mut lp = startpos.checked_sub(1);
let mut distance_to_left_room = 1;
let mut distance_to_right_room = 1;
while let Some(room) = get_room(rp, &arr) {
match room {
RoomType::Robot => (),
RoomType::Coin => break,
RoomType::Empty => (),
}
distance_to_right_room += 1;
rp = match rp {
Some(x) => x.checked_add(1),
None => None,
};
}
while let Some(room) = get_room(lp, &arr) {
match room {
RoomType::Robot => (),
RoomType::Coin => break,
RoomType::Empty => (),
}
distance_to_left_room += 1;
lp = match lp {
Some(x) => x.checked_sub(1),
None => None,
};
}
match distance_to_left_room.cmp(&distance_to_right_room) {
std::cmp::Ordering::Less => Direction::Left(distance_to_left_room),
std::cmp::Ordering::Equal => Direction::Same,
std::cmp::Ordering::Greater => Direction::Right(distance_to_right_room),
}
}
fn get_room(pos: Option<usize>, arr: &Vec<RoomType>) -> Option<RoomType> {
match pos {
Some(p) => arr.get(p).or(None).copied(),
None => None,
}
}

Test details

Test 1

Group: 1, 2

Verdict: ACCEPTED

input
1
R

correct output
0 0

user output
0 0

Test 2

Group: 1, 2

Verdict:

input
10
...R......

correct output
0 0

user output
(empty)

Error:
thread 'main' panicked at 'index out of bounds: the len is 10 but the index is 18446744073709551615', input/code.rs:76:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Test 3

Group: 1, 2

Verdict:

input
10
**.R...***

correct output
12 5

user output
(empty)

Error:
thread 'main' panicked at 'index out of bounds: the len is 10 but the index is 18446744073709551615', input/code.rs:76:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Test 4

Group: 1, 2

Verdict: ACCEPTED

input
10
***R******

correct output
0 0

user output
0 0

Test 5

Group: 1, 2

Verdict:

input
1000
R................................

correct output
947 9

user output
(empty)

Error:
thread 'main' panicked at 'index out of bounds: the len is 1000 but the index is 18446744073709551615', input/code.rs:76:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Test 6

Group: 1, 2

Verdict:

input
1000
.................................

correct output
886 9

user output
(empty)

Error:
thread 'main' panicked at 'index out of bounds: the len is 1000 but the index is 1000', input/code.rs:76:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Test 7

Group: 1, 2

Verdict:

input
1000
.....*..*....**..**..*......*....

correct output
1287 400

user output
(empty)

Error:
thread 'main' panicked at 'index out of bounds: the len is 1000 but the index is 1000', input/code.rs:76:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Test 8

Group: 1, 2

Verdict: ACCEPTED

input
1000
************.*****************...

correct output
0 0

user output
0 0

Test 9

Group: 1, 2

Verdict: ACCEPTED

input
1000
******************************...

correct output
0 0

user output
0 0

Test 10

Group: 1, 2

Verdict:

input
1000
R*****************************...

correct output
999 999

user output
0 0

Test 11

Group: 1, 2

Verdict:

input
1000
******************************...

correct output
999 999

user output
0 0

Test 12

Group: 2

Verdict:

input
10000
.......**........*...........*...

correct output
10971 999

user output
(empty)

Error:
thread 'main' panicked at 'index out of bounds: the len is 10000 but the index is 18446744073709551615', input/code.rs:76:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Test 13

Group: 2

Verdict:

input
10000
*..*....*......*.....*..*........

correct output
9999 999

user output
(empty)

Error:
thread 'main' panicked at 'index out of bounds: the len is 10000 but the index is 10000', input/code.rs:76:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Test 14

Group: 2

Verdict:

input
10000
*.*.*...**.*...*....**.**.**.....

correct output
18766 5000

user output
(empty)

Error:
thread 'main' panicked at 'index out of bounds: the len is 10000 but the index is 10000', input/code.rs:76:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Test 15

Group: 2

Verdict:

input
10000
R*****************************...

correct output
9999 9999

user output
0 0

Test 16

Group: 2

Verdict:

input
10000
******************************...

correct output
9999 9999

user output
0 0

Test 17

Group: 2

Verdict:

input
200000
.................................

correct output
0 0

user output
(empty)

Error:
thread 'main' panicked at 'index out of bounds: the len is 200000 but the index is 200000', input/code.rs:76:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Test 18

Group: 2

Verdict:

input
200000
.................................

correct output
299934 10000

user output
(empty)

Error:
thread 'main' panicked at 'index out of bounds: the len is 200000 but the index is 18446744073709551615', input/code.rs:76:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Test 19

Group: 2

Verdict:

input
200000
**.***....**..**.....***.*..*....

correct output
299998 100000

user output
(empty)

Test 20

Group: 2

Verdict: ACCEPTED

input
200000
******************************...

correct output
0 0

user output
0 0

Test 21

Group: 2

Verdict:

input
200000
R................................

correct output
133765 3

user output
(empty)

Error:
thread 'main' panicked at 'index out of bounds: the len is 200000 but the index is 18446744073709551615', input/code.rs:76:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Test 22

Group: 2

Verdict:

input
200000
R................................

correct output
199982 5000

user output
(empty)

Error:
thread 'main' panicked at 'index out of bounds: the len is 200000 but the index is 18446744073709551615', input/code.rs:76:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Test 23

Group: 2

Verdict:

input
200000
R*****************************...

correct output
199999 199999

user output
0 0

Test 24

Group: 2

Verdict:

input
200000
******************************...

correct output
199999 199999

user output
0 0