Gobidev/adventofcode2024
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Clean up day17 part1

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This commit is contained in:
Adrian Groh 2024-12-17 19:52:07 +01:00
parent bc1d58a2c8
commit b569484664
Signed by: Gobidev
GPG Key ID: 3AA3153E98B0D771
1 changed files with 12 additions and 7 deletions
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19
day17/src/main.rs
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@ -5,7 +5,7 @@ struct State {
reg_c: usize, reg_c: usize,
prog: Vec<u8>, prog: Vec<u8>,
pc: usize, pc: usize,
out: Vec<String>, out: Vec<u8>,
} }
impl State { impl State {
@ -21,9 +21,9 @@ impl State {
fn exec_instruction(&mut self) { fn exec_instruction(&mut self) {
let literal_op = self.prog[self.pc + 1]; let literal_op = self.prog[self.pc + 1];
match self.prog[self.pc] { match self.prog[self.pc] {
0 => self.reg_a /= 2 << (self.get_combo_operand() - 1), 0 => self.reg_a >>= self.get_combo_operand(),
1 => self.reg_b ^= literal_op as usize, 1 => self.reg_b ^= literal_op as usize,
2 => self.reg_b = self.get_combo_operand() % 8, 2 => self.reg_b = self.get_combo_operand() & 7,
3 => { 3 => {
if self.reg_a != 0 { if self.reg_a != 0 {
self.pc = literal_op as usize; self.pc = literal_op as usize;
@ -31,9 +31,9 @@ impl State {
} }
} }
4 => self.reg_b ^= self.reg_c, 4 => self.reg_b ^= self.reg_c,
5 => self.out.push((self.get_combo_operand() % 8).to_string()), 5 => self.out.push((self.get_combo_operand() & 7) as u8),
6 => self.reg_b = self.reg_a / (2 << (self.get_combo_operand() - 1)), 6 => self.reg_b = self.reg_a >> self.get_combo_operand(),
7 => self.reg_c = self.reg_a / (2 << (self.get_combo_operand() - 1)), 7 => self.reg_c = self.reg_a >> self.get_combo_operand(),
_ => panic!("Invalid instruction"), _ => panic!("Invalid instruction"),
} }
self.pc += 2; self.pc += 2;
@ -71,7 +71,12 @@ fn part1(state: &mut State) -> String {
while state.pc < state.prog.len() - 1 { while state.pc < state.prog.len() - 1 {
state.exec_instruction(); state.exec_instruction();
} }
state.out.join(",") state
.out
.iter()
.map(|n| n.to_string())
.collect::<Vec<_>>()
.join(",")
} }
fn main() { fn main() {