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path: root/string_compression.rs
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struct Solution;

impl Solution {
    pub fn compress(chars: &mut Vec<char>) -> i32 {
        let (mut i, mut j, mut count, mut last_char) = (0, 1, 1, chars[0]);
        while j < chars.len() {
            if chars[j] == last_char {
                count += 1;
            } else {
                chars[i] = last_char;
                i += 1;
                if count > 1 {
                    count.to_string().chars().for_each(|x| {
                        chars[i] = x;
                        i += 1;
                    });
                }
                last_char = chars[j];
                count = 1;
            }
            j += 1;
        }
        chars[i] = last_char;
        i += 1;
        if count > 1 {
            count.to_string().chars().for_each(|x| {
                chars[i] = x;
                i += 1;
            });
        }
        i as i32
    }
}

fn main() {
    let mut c = vec!['a','a','b','b','c','c','c'];
    print!("{}", Solution::compress(&mut c));
}