41 lines
887 B
Rust
41 lines
887 B
Rust
use std::fs;
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fn is_safe(report: Vec<i32>) -> bool {
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let mut order = 0;
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for index in 1..report.len() {
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let diff = report[index].checked_sub(report[index - 1]).unwrap();
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let abs_diff = diff.abs();
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if abs_diff < 1 || abs_diff > 3 {
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return false;
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};
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if order == 0 {
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order = diff / abs_diff
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} else if order != diff / abs_diff {
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return false;
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}
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}
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true
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}
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fn solution(s: &str) {
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let mut safe_reports = 0;
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for line in s.lines() {
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if is_safe(
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line.split_whitespace()
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.map(|val| val.parse::<i32>().unwrap())
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.collect(),
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) {
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safe_reports += 1;
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}
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}
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println!("There are {safe_reports} Safe reports!");
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}
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fn main() {
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let s = fs::read_to_string("levels.txt").unwrap();
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solution(&s);
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}
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