CSES - Datatähti 2026 alku

Submission details
Task:	Tulkki
Sender:	ma100
Submission time:	2025-10-28 11:08:13 +0200
Language:	Rust (2021)
Status:	READY
Result:	12

Feedback
group	verdict	score
#1	ACCEPTED	12
#2	RUNTIME ERROR	0
#3	RUNTIME ERROR	0

Test results
test	verdict	time	group
#1	ACCEPTED	0.00 s	1, 2, 3	details
#2	ACCEPTED	0.00 s	1, 2, 3	details
#3	ACCEPTED	0.00 s	1, 2, 3	details
#4	ACCEPTED	0.00 s	1, 2, 3	details
#5	ACCEPTED	0.00 s	1, 2, 3	details
#6	ACCEPTED	0.01 s	1, 2, 3	details
#7	RUNTIME ERROR	0.00 s	2, 3	details
#8	RUNTIME ERROR	0.00 s	2, 3	details
#9	RUNTIME ERROR	0.00 s	2, 3	details
#10	RUNTIME ERROR	0.00 s	2, 3	details
#11	RUNTIME ERROR	0.00 s	2, 3	details
#12	RUNTIME ERROR	0.00 s	2, 3	details
#13	RUNTIME ERROR	0.00 s	3	details
#14	RUNTIME ERROR	0.00 s	3	details
#15	RUNTIME ERROR	0.00 s	3	details
#16	RUNTIME ERROR	0.00 s	3	details
#17	RUNTIME ERROR	0.00 s	3	details
#18	RUNTIME ERROR	0.00 s	3	details

Code

use std::io::{self, Read};

fn main() {
    let mut regs: [u32; 26] = [0; 26];
    let mut left_over = String::with_capacity(0x80);
    let mut total_input = String::with_capacity(0xff);
    io::stdin().read_to_string(&mut total_input).expect("read stdin error");
    let mut total_input = total_input.split("\n");
    loop {
        let mut input = left_over.clone();
        // Read a new line if too little data is available
        if left_over.split_ascii_whitespace().count() < 2 {
            let mut buf = input.clone();
            buf.push_str(match total_input.next() {
                Some(s) => s,
                None => break,
            });
            let mut buf = buf.trim();
            match buf.find("#") {
                Some(i) => buf = &buf[..i],
                None => {},
            };
            if buf.is_empty() {
                continue;
            }
            input = buf.to_string();
        }
        let mut input = input.split_ascii_whitespace();

        let instr = input.next().expect("too few arguments");
        left_over.push_str(instr);
        left_over.push(' ');

        let reg = match input.next() {
            Some(s) => s,
            None => continue,
        };
        left_over.push_str(reg);
        left_over.push(' ');
        let reg: usize = (reg.as_bytes()[0] - 65).into();

        match instr {
            "CLEAR" => regs[reg] = 0,
            "INCREASE" => regs[reg] += 1,
            "PRINT" => println!("{}", regs[reg]),
            _ => panic!("illegal instruction '{instr}'"),
        }

        left_over = String::with_capacity(0x80);
        for member in input {
            left_over.push_str(member);
            left_over.push(' ');
        }
    }
}

Test details

Test 1 (public)

Group: 1, 2, 3

Verdict: ACCEPTED

input
`PRINT X INCREASE X PRINT X INCREASE X PRINT X ...` view save

correct output
`0 1 2 0` view save

user output
`0 1 2 0` view save

Test 2 (public)

Group: 1, 2, 3

Verdict: ACCEPTED

input
`INCREASE X # aybabtu PRINT X INCREASE # test ...` view save

correct output
`1 3` view save

user output
`1 3` view save

Test 3 (public)

Group: 1, 2, 3

Verdict: ACCEPTED

input
`# Create number 3 INCREASE X INCREASE X INCREASE X ...` view save

correct output
`3` view save

user output
`3` view save

Test 4 (public)

Group: 1, 2, 3

Verdict: ACCEPTED

input
`INCREASE A PRINT A INCREASE B PRINT B INCREASE C ...` view save

correct output
`1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...` view save

user output
`1 1 1 1 1 ...` view save

Test 5 (public)

Group: 1, 2, 3

Verdict: ACCEPTED

input
`INCREASE X INCREASE X INCREASE X INCREASE X INCREASE X ...` view save

correct output
`999` view save

user output
`999` view save

Test 6 (public)

Group: 1, 2, 3

Verdict: ACCEPTED

input
`PRINT X PRINT X PRINT X PRINT X PRINT X ...` view save

correct output
`0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ...` view save

user output
`0 0 0 0 0 ...` view save

Test 7 (public)

Group: 2, 3

Verdict: RUNTIME ERROR

input
`INCREASE A INCREASE A INCREASE A INCREASE A INCREASE A ...` view save

correct output
`5 5 5 5 5` view save

user output
(empty)

Error:

thread 'main' panicked at input/code.rs:46:18:
illegal instruction 'REPEAT'
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Test 8 (public)

Group: 2, 3

Verdict: RUNTIME ERROR

input
`INCREASE A INCREASE A INCREASE A INCREASE A INCREASE A ...` view save

correct output
`0 0 0 0 0` view save

user output
(empty)

Error:

thread 'main' panicked at input/code.rs:46:18:
illegal instruction 'REPEAT'
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Test 9 (public)

Group: 2, 3

Verdict: RUNTIME ERROR

input
`INCREASE A INCREASE A INCREASE A INCREASE A INCREASE A ...` view save

correct output
`6 7 8 9 10` view save

user output
(empty)

Error:

thread 'main' panicked at input/code.rs:46:18:
illegal instruction 'REPEAT'
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Test 10 (public)

Group: 2, 3

Verdict: RUNTIME ERROR

input
`INCREASE A INCREASE A INCREASE A INCREASE A INCREASE A ...` view save

correct output
`5 5` view save

user output
(empty)

Error:

thread 'main' panicked at input/code.rs:46:18:
illegal instruction 'REPEAT'
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Test 11 (public)

Group: 2, 3

Verdict: RUNTIME ERROR

input
`INCREASE A INCREASE A INCREASE A INCREASE A INCREASE A ...` view save

correct output
`20` view save

user output
(empty)

Error:

thread 'main' panicked at input/code.rs:46:18:
illegal instruction 'REPEAT'
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Test 12 (public)

Group: 2, 3

Verdict: RUNTIME ERROR

input
`INCREASE A INCREASE A INCREASE B INCREASE B ...` view save

correct output
`42` view save

user output
(empty)

Error:

thread 'main' panicked at input/code.rs:46:18:
illegal instruction 'REPEAT'
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Test 13 (public)

Group: 3

Verdict: RUNTIME ERROR

input
`INCREASE A INCREASE A INCREASE A INCREASE A INCREASE A ...` view save

correct output
`1 2 2 3 3 3 4 4 4 4 5 5 5 5 5` view save

user output
(empty)

Error:

thread 'main' panicked at input/code.rs:46:18:
illegal instruction 'REPEAT'
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Test 14 (public)

Group: 3

Verdict: RUNTIME ERROR

input
`# Create number 3 INCREASE A INCREASE A INCREASE...` view save

correct output
`12` view save

user output
(empty)

Error:

thread 'main' panicked at input/code.rs:46:18:
illegal instruction 'REPEAT'
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Test 15 (public)

Group: 3

Verdict: RUNTIME ERROR

input
`INCREASE X INCREASE X INCREASE X INCREASE X INCREASE X ...` view save

correct output
`531441` view save

user output
(empty)

Error:

thread 'main' panicked at input/code.rs:46:18:
illegal instruction 'REPEAT'
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Test 16 (public)

Group: 3

Verdict: RUNTIME ERROR

input
`INCREASE A INCREASE A INCREASE A INCREASE A INCREASE A ...` view save

correct output
`1337` view save

user output
(empty)

Error:

thread 'main' panicked at input/code.rs:46:18:
illegal instruction 'REPEAT'
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Test 17 (public)

Group: 3

Verdict: RUNTIME ERROR

input
`INCREASE A INCREASE A REPEAT A TIMES ( REPEAT A TIMES ( ...` view save

correct output
`1 2 1 2 1 1 3 4 3 4 3 4 3 4 3 ...` view save

user output
(empty)

Error:

thread 'main' panicked at input/code.rs:46:18:
illegal instruction 'REPEAT'
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Test 18 (public)

Group: 3

Verdict: RUNTIME ERROR

input
`# Efficient algorithm for find...` view save

correct output
`2 3 5 7 11 13 17 19 23 29 31 3...` view save

user output
(empty)

Error:

thread 'main' panicked at input/code.rs:46:18:
illegal instruction 'REPEAT'
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Datatähti 2026 alku

Tulkki

Code

Test details

Test 1 (public)

Test 2 (public)

Test 3 (public)

Test 4 (public)

Test 5 (public)

Test 6 (public)

Test 7 (public)

Test 8 (public)

Test 9 (public)

Test 10 (public)

Test 11 (public)

Test 12 (public)

Test 13 (public)

Test 14 (public)

Test 15 (public)

Test 16 (public)

Test 17 (public)

Test 18 (public)

Tasks

Submissions (ma100)