#include "bits/stdc++.h" #define REP(i, n) for(int i = 0; i < int(n); i++) #define FOR(i,n,m) for(int i = int(n); i < int(m); i++) using namespace std; typedef long long ll; const int MOD = 1e9 + 7; const int INF = 1e9 + 6; const ll LLINF = 1e18 + 1; int p, q, a; bool f(int mid) { int b = (int)((1 + p / 100.0)*mid); int c = (int)((1 + q / 100.0)*mid) + a; return c > b; } int main() { cin >> p >> q >> a; if (p <= q) { puts("1000000000"); return 0; } int ans = int((a - 1)*100.0 / (p - q)); int k = int((a + 1) * 100.0 / (p - q)); for (int i = ans + 1; i <= k; i++) { if (f(i)) ans++; } cout << ans << endl; return 0; }