41 lines
1.4 KiB
Rust
41 lines
1.4 KiB
Rust
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// Copyright 2022 Christian Ulrich
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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// usage: ./part1 < input
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pub mod common;
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use common::Forest;
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fn main() -> Result<(), &'static str> {
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let forest = Forest::from_stdin()?;
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let (x_len, y_len) = forest.dimensions();
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let mut result = 0;
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for y in 0..y_len {
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for x in 0..x_len {
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let tree = forest.tree(x, y).unwrap();
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let is_visible = forest.line(y).unwrap().take(x).all(|t| t < &tree)
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|| forest.line(y).unwrap().skip(x + 1).all(|t| t < &tree)
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|| forest.column(x).unwrap().take(y).all(|t| t < &tree)
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|| forest.column(x).unwrap().skip(y + 1).all(|t| t < &tree);
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if is_visible {
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result += 1;
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}
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}
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}
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println!("{result}");
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Ok(())
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}
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