#include <bits/stdc++.h>
using namespace std;
const int MAX_N = 1e5 + 1;
const int MOD = 1e9 + 7;
const int INF = 1e9;
const long long LINF = 1e18;
void solve() {}
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int n, x, y;
  cin >> n >> x >> y;
  int w;
  if ((n * y) % 100 == 0) {
    w = n * y / 100;
  } else {
    w = n * y / 100 + 1;
  }
  cout << w - x;
  return 0;
}
