use std::io::Read;

fn main() {
    let mut all_data = String::new();
    std::io::stdin().read_to_string(&mut all_data).ok();
    let mut all_data = all_data.trim().split('\n').map(|s| s.trim());
    let nmk: Vec<usize> = all_data.next().unwrap().split_whitespace().map(|s| s.parse().unwrap()).collect();
    let n: usize = nmk[0];
    let m: usize = nmk[1];
    let k: usize = nmk[2];
    let opb: Vec<&str> = all_data.next().unwrap().split_whitespace().collect();
    let mut b: Vec<usize> = opb.iter().skip(1).map(|s| s.parse().unwrap()).collect();
    b.sort();
    let op: &str = opb[0];
    let a: Vec<usize> = all_data.take(n as usize).map(|s| s.parse().unwrap()).collect();
    let mut result: usize = 0;
    for i in a.iter() {
        let mut lower = 0;
        let mut upper = m - 1;
        let mut middle = (lower + upper) / 2;
        while upper - lower > 0 {
            let target = match op {
                "+" => i + b[middle],
                "*" => i * b[middle],
                _ => 0
            };
            if target < k {
                lower = middle + 1;
            } else {
                upper = middle;
            }
            middle = (lower + upper) / 2;
        }
        let target = match op {
            "+" => i + b[middle],
            "*" => i * b[middle],
            _ => 0
        };
        result += m - middle + if target >= k { 1 } else { 0 } - 1;
    }
    println!("{}", result);
}