#include <stdio.h>
#define ll long long
#define rep(i,l,r)for(ll i=l;i<r;i++)
#define max(p,q)((p)>(q)?(p):(q))

int main(){
	ll x,y,s;
	while(scanf("%lld%lld%lld",&x,&y,&s),x){
		ll M=0;
		x+=100;
		y+=100;
		ll t=s*100/x;//大体税抜き価格
		rep(i,1,t)rep(j,max(0,t-i-2),t-i+3)if(i*x/100+j*x/100==s){
			M=max(M,i*y/100+j*y/100);
		}
		printf("%lld\n",M);
	}
}
