#include <iostream>
#include <cmath>
#include <set>
#include <vector>
#include <algorithm>
#pragma GCC optimize("Ofast")
using ll = long long;
using ld = long double;
using namespace std;
signed main() {
ld m,p,k;
cin >> m >> p >> k;
ld cur = m,ans = 1;
while(cur <= k){
cur += cur/100 * p;
ans++;
}
cout << ans;
#include <iostream>
#include <cmath>
#include <set>
#include <vector>
#include <algorithm>
#pragma GCC optimize("Ofast")
using ll = long long;
using ld = long double;
using namespace std;
signed main() {
ld m,p,k;
cin >> m >> p >> k;
ld cur = m,ans = 1;
while(cur <= k){
cur += cur/100 * p;
ans++;
}
cout << ans;
}