#include <iostream>
#include <vector>
#include <algorithm>
#include <iomanip>
#include <string>
#include <stack>
#include <queue>
#include <map>
#include <set>
#include <tuple>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <climits>
#include <cassert>
#include <cstdint>
#include <numeric>
#include <bitset>
#include <functional>

using namespace std;

using ll =  long long;
using Pll = pair<ll, ll>;
using Pii = pair<int, int>;

constexpr ll MOD = 1000000007;
constexpr long double EPS = 1e-10;
constexpr int dyx[4][2] = {
    { 0, 1}, {-1, 0}, {0,-1}, {1, 0}
};
constexpr ll ANS_MAX = 1000000000;

int main() {
    ios::sync_with_stdio(false); cin.tie(nullptr);
    ll p, q, a;
    cin >> p >> q >> a;

    if(p == q) {
        if(a == 0) {
            cout << 0 << endl;
        } else {
            cout << ANS_MAX << endl;
        }
        return 0;
    }

    ll ans = 0LL;

    for(int i=1;i<=100*(a+1);++i) {
        if(p*i/100 < q*i/100 + a) {
            ++ans;
        }
    }

    if(p < q) {
        ans += ANS_MAX - (100 * (a+1));
    }

    cout << ans << endl;
}