29 lines
584 B
Rust
29 lines
584 B
Rust
use std::error::Error;
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use std::io;
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use std::process;
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fn run() -> Result<u64, Box<dyn Error>> {
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let mut rdr = csv::Reader::from_reader(io::stdin());
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let mut record = csv::ByteRecord::new();
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let mut count = 0;
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while rdr.read_byte_record(&mut record)? {
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if &record[0] == b"us" && &record[3] == b"MA" {
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count += 1;
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}
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}
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Ok(count)
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}
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fn main() {
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match run() {
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Ok(count) => {
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println!("{}", count);
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}
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Err(err) => {
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println!("{}", err);
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process::exit(1);
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}
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}
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}
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