01 specification

Counting Bytes

Input is a 100 MiB byte array. Return the number of bytes equal to 127 by printing the count to stdout.

Example: if the input bytes are [127, 0, 127, 255], the correct output is 2.

minimal Rust solution

use std::io::Read;

fn main() {
    let mut input = Vec::new();
    std::io::stdin().read_to_end(&mut input).unwrap();
    let count = input.iter().filter(|&&byte| byte == 127).count();
    print!("{count}");
}

02 scope / runtime over time

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