#include <bits/stdc++.h>

using namespace std;

#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()
#define fi first
#define se second

template<typename A, typename B> inline bool chmax(A &a, B b) { if (a<b) { a=b; return 1; } return 0; }
template<typename A, typename B> inline bool chmin(A &a, B b) { if (a>b) { a=b; return 1; } return 0; }

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<int, pll> pip;
const ll INF = 1ll<<29;
const ll MOD = 1000000007;
const double EPS  = 1e-9;

ll b[3];

int main() {
	REP(i, 3) cin >> b[i];
	
	
	for (int i = -10000000; i <= 10000000; i++) {
		ll d = i; // *100
		
		//if ((b[1] - d) % b[0] != 0) continue;
		ll r = (100 * b[1] - d) / b[0]; // *100
		
		if (b[1] * r + d != b[2] * 100) continue;
		
		ll ans = b[2] * r + d;
		if (ans % 100 != 0) continue;
		ans /= 100;
		
		printf("%lld\n", ans);
		break;
	}
	
	return 0;
}