Kertoma

use std::io::{stdin, BufRead};

fn main() {
    let luvut = stdin()
        .lock()
        .lines()
        .next()
        .unwrap()
        .unwrap()
        .trim()
        .split(" ")
        .map(|val| val.parse::<u32>().unwrap())
        .collect::<Vec<u32>>();

    let lukuja_yhteensa: u32 = luvut.iter().sum();

    let mut sum: f64 = 2.0;
    let mut i = 2.0;

    loop {
        if (sum.log10().floor() + 1.0) as u32 == lukuja_yhteensa {
            let mut thingy = true;

            if i < 10.0 {
                for i in 0..=9 {
                    let mut amount = 0;
                    let chr = format!("{}", i).chars().next().unwrap();
                    for _chr in format!("{:.0}", sum).chars() {
                        if chr == _chr {
                            amount += 1;
                        }
                    }
                    if !(amount == luvut[i]) {
                        thingy = false;
                        break;
                    }
                }
                if thingy {
                    println!("{}", i);
                    break;
                }
            } else {
                println!("{}", i);
                break;
            }
        }

        i += 1.0;
        sum *= i;
    }
}

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

Test 2

Group: 1, 2, 3

Verdict: ACCEPTED

Test 3

Group: 1, 2, 3

Verdict: ACCEPTED

Test 4

Group: 1, 2, 3

Verdict: ACCEPTED

Test 5

Group: 1, 2, 3

Verdict: ACCEPTED

Test 6

Group: 1, 2, 3

Verdict: ACCEPTED

Test 7

Group: 2, 3

Verdict: TIME LIMIT EXCEEDED

Test 8

Group: 2, 3

Verdict: TIME LIMIT EXCEEDED

Test 9

Group: 2, 3

Verdict: TIME LIMIT EXCEEDED

Test 10

Group: 2, 3

Verdict: TIME LIMIT EXCEEDED

Test 11

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 12

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 13

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 14

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 15

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 16

Group: 3

Verdict: TIME LIMIT EXCEEDED