27 lines
662 B
Rust
27 lines
662 B
Rust
use std::io::{self, Read, Write};
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fn main() {
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let mut stdin = io::stdin();
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let mut stdout = io::stdout();
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let mut input = String::new();
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stdin.read_to_string(&mut input).unwrap();
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let mut inputs = input.split_whitespace();
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let input1 = inputs.next().unwrap();
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let input2 = inputs.next().unwrap();
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let width = input1.parse::<i32>().unwrap();
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let height: i32 = input2.parse().unwrap();
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let result =
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if width % 2 == 0 || height % 2 == 0 {
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width * height / 2
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}
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else {
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(width * height - 1) / 2
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};
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stdout.write_all(format!("{}\n", result).as_ref()).unwrap();
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}
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