day6 part1
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7
day6/Cargo.lock
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day6/Cargo.lock
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# This file is automatically @generated by Cargo.
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# It is not intended for manual editing.
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version = 3
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[[package]]
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name = "day6"
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version = "0.1.0"
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day6/Cargo.toml
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day6/Cargo.toml
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[package]
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name = "day6"
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version = "0.1.0"
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edition = "2021"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[dependencies]
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day6/input.txt
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day6/input.txt
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Time: 63 78 94 68
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Distance: 411 1274 2047 1035
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day6/src/main.rs
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day6/src/main.rs
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use std::fs;
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fn main() {
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let input = fs::read_to_string("input.txt").unwrap();
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let input: Vec<_> = input.split('\n') // Seperate the Time and Distance lines
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.map(|line| {
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&line[line.find(':').unwrap() + 1..] // Drop "Time:" and "Distance:"
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}).map(|line| {
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line.split_whitespace() // Split the numbers into their own elements.
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.map(|num| num.parse::<i32>().expect("Couldn't parse number")) // Parse numbers into i32
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.collect::<Vec<_>>()
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}).collect(); // collect into Vec
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let mut valid_total = 1;
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for round in 0..input.first().unwrap().len() {
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let time = input[0][round];
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let dist = input[1][round];
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let mut valid = 0;
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for remaining_time in 0..time {
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if (time - remaining_time) * remaining_time > dist {
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valid += 1;
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}
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}
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valid_total *= valid;
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}
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println!("{}", valid_total);
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}
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