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extern crate crypto;
use std::io::{self, Read};
use crypto::digest::Digest;
use crypto::md5::Md5;
fn solve1(input: &str) -> String {
let mut password = String::new();
let mut index = 0u64;
while password.len() < 8 {
let mut md5 = Md5::new();
md5.input_str(input);
md5.input_str(&index.to_string());
let digest = md5.result_str();
if &digest[0..5] == "00000" {
password.push_str(&digest[5..6]);
}
index += 1;
}
password
}
fn solve2(input: &str) -> String {
let mut password = [None; 8];
let mut index = 0u64;
while !password.iter().all(Option::is_some) {
let mut md5 = Md5::new();
md5.input_str(input);
md5.input_str(&index.to_string());
let digest = md5.result_str();
if &digest[0..5] == "00000" {
if let Some(pos @ 0 ... 7) = digest[5..6].parse().ok() {
password[pos] = password[pos].or(digest[6..7].chars().next());
}
}
index += 1;
}
password.iter()
.cloned()
.map(Option::unwrap)
.collect()
}
fn main() {
let mut input = String::new();
io::stdin().read_to_string(&mut input).unwrap();
println!("Part 1: {}", solve1(input.trim()));
println!("Part 2: {}", solve2(input.trim()));
}
#[test]
#[ignore]
fn part1() {
assert_eq!("18f47a30", solve1("abc"));
}
#[test]
#[ignore]
fn part2() {
assert_eq!("05ace8e3", solve2("abc"));
}
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