fn power(i: usize, p: usize, c: usize) -> usize {
    if p == 0 { return 1usize; }
    if p == 1 { return i; }
    let temp = power(i, p/2, c);
    temp * temp * power(i, p%2, c) % c
}

fn main() {
    let mut abc = String::new();
    std::io::stdin().read_line(&mut abc).ok();
    let abc: Vec<usize> = abc.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
    let a = abc[0];
    let b = abc[1];
    let c = abc[2];
    
    let mut values: Vec<usize> = vec![0; c+1];
    for i in 1..=c {
        values[i] = power(i, b, c);
    }
    let mut result = 0usize;
    for i in 1..=a%c {
        result += values[i];
        result %= c;
    }
    let times = a / c;
    for v in values.iter() {
        result += v * times;
        result %= c;
    }
    println!("{}", result);
}