27 lines
832 B
Rust
27 lines
832 B
Rust
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use regex::Regex;
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fn main() -> std::io::Result<()> {
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let mut sum: u32 = 0;
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let re1 = Regex::new(r"(do\(\)|don't\(\)|mul\([0-9]*,[0-9]*\))").unwrap();
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let re2 = Regex::new(r"mul\(([0-9]*),([0-9]*)\)").unwrap();
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let hay = std::io::read_to_string(std::io::stdin()).unwrap();
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let mut i_do = true;
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for (_, [does]) in re1.captures_iter(&hay).map(|c| c.extract()) {
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if does == "do()" {
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i_do = true;
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}
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if does == "don't()" {
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i_do = false;
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}
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if i_do {
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for (_, [num1, num2]) in re2.captures_iter(does).map(|c| c.extract()) {
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let num1: u32 = num1.parse().unwrap();
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let num2: u32 = num2.parse().unwrap();
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sum += num1 * num2;
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}
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}
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}
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println!("{}", sum);
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Ok(())
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}
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