#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}
};

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

    // 明らかに買えるもの
    ll buyed = 0;
    if(q < p) {
        buyed = max(0LL, (200 - 100*a + 1) / (q-p));
    } else {
        buyed = max(0LL, (200 - 100*a + 1) / (p-q));
    }
    ll ans = buyed;

    int i = buyed + 1;
    while(abs(100*a + q * i - p * i) <= 200) {
        if(a + q * i / 100 > p * i / 100) ++ans;
        ++i;
    }
    cout << ans  << endl;

}