use std::collections::HashMap; fn main() { let arr = ['C','C','A','A','B']; let mut count: HashMap<char,i32> = HashMap::new(); for a in arr { // println!("{}",a); match a { 'A' => { let val = count.get(&'A').unwrap_or(&0); let val_i32 : i32 = *val; </char,i32>…