#![allow(unused_imports)]
#![allow(non_snake_case)]
use std::cmp::*;
use std::collections::*;
use std::io::Write;

fn main() {
    let v = read_vec::<i64>();
    let (p, q, a) = (v[0], v[1], v[2]);
    let criterion = |x| x * p / 100 < x * q / 100 + a;
    let mut ans = 0;
    for i in 1..1000000001 {
        if criterion(i) {
            ans += 1;
        }
    }
    println!("{}", ans);
}

fn read<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().parse().ok().unwrap()
}

fn read_vec<T: std::str::FromStr>() -> Vec<T> {
    read::<String>()
        .split_whitespace()
        .map(|e| e.parse().ok().unwrap())
        .collect()
}