#include <bits/stdc++.h>
#include <set>
#include <cstdio>
#include <vector>
#include <iostream>
#include <utility>

#define fir first
#define sec second
#define get(n) scanf("%d",&n);
#define gets(s) string s;cin >> (s);
#define All(s) (c).begin(), (c).end()
#define chmin(x, y) x = min(x, y);
#define chmax(x, y) x = max(x, y);
#define rep(i, j) for (int (i)=0;(i)<(j);(i)++)
#define repk(i, j, k) for(int (i)=(j);(i)<(k);(i)++)
#define dump(x)  cout << #x << " = " << (x) << endl;
#define debug(x) cout << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << endl;
using namespace std;
typedef long long int ll;
const ll INF = 10241024;
int P,Q,A;

void input(){
    cin >> P >> Q >> A;
}
bool updown(int x){
    int a = Q*x / 100;a = floor(a) + A;
    int b = P*x / 100 ;b = floor(b);
    return a > b;
}
void solve(){
    input();
    int MA = 1e6;
    int ans = 0;
    repk(i, 1, MA)if(updown(i)) ans++;
    if(updown(MA))ans += 1e9 - MA + 1;
    cout << ans << endl;
    return;
}
int main () {
    solve();
    return 0;
}