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part2.rs
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part2.rs
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use super::*;
type OutputType = super::part1::OutputType;
pub fn solve(input: &InputType, config: &PuzzleConfig) -> OutputType {
let mut field = input.clone();
let elves = {
let mut elves = Vec::new();
for (xx, row) in field.iter().enumerate() {
for (yy, cell) in row.iter().enumerate() {
if let Field::Unit(unit) = cell {
if let UnitType::Elf = unit.utype {
elves.push(Location2D::new(xx as isize, yy as isize))
}
}
}
}
elves
};
//println!("elves: {:?}", elves);
for power in 4 .. {
for pos in elves.iter() {
if let Field::Unit(ref mut elf) = field[pos.xx_as_usize()][pos.yy_as_usize()] {
elf.attack_power = power;
}
}
let (result, elves_survived) = part1::solve(&field.clone(), config);
//println!("{:2} -> {} ({} survied elves)", power, result, elves_survived);
if elves_survived == elves.len() {
//println!("Ended with a power of {}", power);
return result;
}
}
0
}
#[cfg(test)]
mod tests {
use super::*;
fn solve_example(name: &str) -> OutputType {
let (input, config) = parse_input(name, false);
solve(&input, &config)
}
#[test]
fn example0_2() {
assert_eq!(solve_example("example0_2"), 4988);
}
#[test]
fn example2() {
assert_eq!(solve_example("example2"), 31284);
}
#[test]
fn example3() {
assert_eq!(solve_example("example3"), 3478);
}
#[test]
fn example4() {
assert_eq!(solve_example("example4"), 6474);
}
#[test]
fn example5() {
assert_eq!(solve_example("example5"), 1140);
}
}