#include<stdio.h>

int main(){
  int i,j;
  int x,y;
  int s;
  int ans;
  int ans1,ans2;
  int rel;
  int rel1,rel2;
  int max=-1;

  while(1){
    max=-1;
    scanf("%d %d %d",&x,&y,&s);

    if(x==0&&y==0&&s==0) break;

    for(i=1;i<s;i++){
      for(j=i;j<=s;j++){
        ans1=i*(100+x)/100;
        ans2=j*(100+x)/100;
        ans=ans1+ans2;
        if(ans==s){
          rel1=i*(100+y)/100;
          rel2=j*(100+y)/100;
          rel=rel1+rel2;
          if(max<rel) max=rel;
        }
      }
    }

    printf("%d\n",max);

  }

  return 0;
}