YannAhlgrim
49 lines
1.2 KiB
Rust
49 lines
1.2 KiB
Rust
use std::fs;
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fn main() {
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// let input = [
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// "987654321111111",
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// "811111111111119",
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// "234234234234278",
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// "818181911112111",
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// ];
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let input: String =
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fs::read_to_string("input.txt").expect("text file cannot be read to string");
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let input = input.split("\n");
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let mut res = 0;
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for el in input {
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if el == "" {
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break;
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}
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let length = el.chars().count() - 1;
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let numbers: Vec<u32> = el
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.chars()
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.collect::<Vec<_>>()
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.iter()
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.map(|c| c.to_digit(10).unwrap())
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.collect();
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let first_num = max_number(&numbers, 0, length);
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let second_num = max_number(&numbers, first_num.1 + 1, length + 1);
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res += concat_f(first_num.0, second_num.0);
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}
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println!("{}", res);
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}
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fn max_number(numbers: &Vec<u32>, start: usize, end: usize) -> (u32, usize) {
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let mut max: u32 = numbers[start];
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let mut max_idx: usize = 0;
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for i in start..end {
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if numbers[i] > max {
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max = numbers[i];
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max_idx = i;
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}
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}
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(max, max_idx)
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}
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fn concat_f(a: u32, b: u32) -> u64 {
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format!("{}{}", a, b).parse().unwrap()
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}
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