#include <stdio.h>

int main(int argc, const char * argv[]) {
    
    int x,y,s,i,j,xs[10000][2];
    
    while (1) {
        
        int xs_count=0,max=-1;
        
        scanf("%d %d %d",&x,&y,&s);
        
        if (x==0&&y==0&&s==0) {
            break;
        }
        int xsx = (100.0+x);
        //?¨????x??§???????????????????¨????s?????????????????????????????¢???
        for (i = 1; i < s-1; i++) {
            for (j = 1; j < s-1; j++) {
                
                int xsxs = i*xsx/100 + j*xsx/100;
                
                if (s==(xsxs)) {
                    
                    xs[xs_count][0]=i;
                    xs[xs_count][1]=j;
                    xs_count++;
                    
                }
            }
        }
        
        //s????????£??????????????????????¨????????????§??????????????¨???
        
        for (i = 0; i < xs_count; i++) {
            int sy = (100.0+y);
            int xsy = xs[i][0]*sy/100 + (int)xs[i][1] * sy/100;
            
            if (xsy > max) {
                max = xsy;
            }
            
        }
        
        
        printf("%d\n",max);
    }
    return 0;
}