#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<n;++i)
#define all(x) (x).begin(),(x).end()
using namespace std;
const int INF=1145141919,MOD=1e9+7;
const int64_t LINF=8931145141919364364,LMOD=998244353;
// const int dy[]={0,-1,0,1,1,-1,-1,1};
// const int dx[]={1,0,-1,0,1,1,-1,-1};

int main() {
	int64_t p, q, a; cin >> p >> q >> a;
	int64_t ans = 0;
	for(int64_t i = 1; i <= 100 * (a + 1); ++i) {
		int64_t shop = (100 + p) * i / 100;
		int64_t home = (100 + q) * i / 100 + a;
		if(shop < home) ans++;
	}
	int64_t shop = (100 + p) * 1e9 / 100;
	int64_t home = (100 + q) * 1e9 / 100 + a;
	if(shop < home) ans += 1e9 - 100 * (a + 1);
	cout << ans << endl;
	return 0;
}