#include <iostream>
#include <vector>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <iomanip>
using namespace std;
using ll = long long;

int main() {
    ll p, q, a;
    cin >> p >> q >> a;
    int c = 200000000;
    int ans = 0;
    for(ll i = 1; i <= c; i++) {
        if(i * (100 + p) / 100 < i * (100 + q) / 100 + a) ans++;
    }
    if(p < q) ans += 1000000000 - c;
    if(p == q) {
        if(a != 0) ans += 1000000000 - c;
    }
    cout << ans << endl;
    return 0;
}