#include <bits/stdc++.h>
using namespace std;

int main() {
  int p, q, a;
  cin >> p >> q >> a;
  if (p == q) {
    if (a) {
      cout << (int)1e9 << '\n';
    } else {
      cout << 0 << '\n';
    }
    return 0;
  }
  if (p < q) {
    if (a) {
      cout << (int)1e9 << '\n';
    } else {
      int res = 1e9;
      long long x = 1;
      while (clock() * 1000 / CLOCKS_PER_SEC < 900) {
        res -= p * x / 100 == q * x / 100;
        ++x;
      }
      cout << res << '\n';
    }
    return 0;
  }
  auto chk = [&](long long x) -> bool {
    return x * (100 + p) / 100 < x * (100 + q) / 100 + a;
  };
  int res = 0;
  for (int r = 1; r <= 100; ++r) {
    int ok = -1, ng = 1e7;
    while (ng - ok > 1) {
      int mid = (ok + ng) / 2;
      (chk(100 * mid + r) ? ok : ng) = mid;
    }
    res += ok + 1;
  }
  cout << res << '\n';
}