Lehmät

fn main() {
    let mut first_line = String::new();
 
    std::io::stdin().read_line(&mut first_line).unwrap();
 
    let mut input_iter = first_line.trim().split_whitespace();
 
    let n = input_iter.next().unwrap().trim().parse::<i64>().unwrap();
 
    //let m = input_iter.next().unwrap().trim().parse::<i64>().unwrap();
 
    let mut loop_counter: i64 = 0;
 
    let mut result: i64 = 0;
 
    while loop_counter < n{ 
        loop_counter += 1;
 
        let mut read_string = String::new();
 
        std::io::stdin().read_line(&mut read_string).unwrap();
        
 
        
        match read_string.find("*"){
            Some(x) => {
                let _index = x;
                
                
 
                let (_, split) = read_string.trim().split_at(x+1); 
                    
                for elem in split.chars() {
                    if elem == '@'{
                        result += 1;
                    }
                    else if elem == '*'{
                        break;
                    }
                }
            },
            None => continue
        }
    }
 
    println!("{}",result);
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 1, 2

Verdict: ACCEPTED

Test 3

Group: 1, 2

Verdict: ACCEPTED

Test 4

Group: 1, 2

Verdict: ACCEPTED

Test 5

Group: 1, 2

Verdict: ACCEPTED

Test 6

Group: 2

Verdict: ACCEPTED

Test 7

Group: 2

Verdict: ACCEPTED

Test 8

Group: 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: ACCEPTED