#include <bits/stdc++.h>
using namespace std;
template <class T>
string toStr(const T &x) {
  stringstream s;
  s << x;
  return s.str();
}
template <class T>
int toInt(const T &x) {
  stringstream s;
  s << x;
  int r;
  s >> r;
  return r;
}
int dx[8] = {-1, -1, -1, 0, 1, 1, 1, 0};
int dy[8] = {-1, 0, 1, 1, 1, 0, -1, -1};
int main() {
  int n, x, y;
  cin >> n >> x >> y;
  int target = ceil((n * y) / 100.0);
  if (target > x)
    cout << target - x;
  else
    cout << 0;
  return 0;
}
