54 lines
1.2 KiB
Rust
54 lines
1.2 KiB
Rust
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#![feature(const_str_split_at)]
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const INPUT_LINES: usize = {
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let bytes = include_bytes!("input.txt");
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let mut i = 0;
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let mut count = 0;
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while i < bytes.len() {
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if bytes[i] == b'\n' {
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count += 1;
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}
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i += 1;
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}
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count
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};
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const INPUT: [u128; INPUT_LINES] = {
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let data = include_str!("input.txt");
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let mut nums = [0; INPUT_LINES];
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let mut i = 0;
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let mut count = 0;
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let mut last_newline = 0;
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while i < data.len() {
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if data.as_bytes()[i] == b'\n' {
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let Ok(parsed) = u128::from_str_radix(data.split_at(last_newline).1.split_at(i - last_newline).0.trim_ascii(), 10) else {
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panic!();
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};
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nums[count] = parsed;
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count += 1;
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last_newline = i;
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}
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i += 1;
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}
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nums
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};
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fn main() {
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let mut sum = 0u128;
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for mut secret in INPUT {
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for _ in 0..2000 {
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secret ^= secret * 64;
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secret %= 16777216;
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secret ^= secret / 32;
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secret %= 16777216;
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secret ^= secret * 2048;
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secret %= 16777216;
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}
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sum += secret;
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}
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println!("Result: {sum}");
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}
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