#include <stdio.h>

int main(void){
	int n,m,p,x[1234],t,s;
	while(1){
	scanf("%d %d %d",&n,&m,&p);
		if((n==0)&&(m==0)&&(p==0));
	s=0;
	for(t=0;t<n;t++){
		scanf("%d",&x[t]);
		s+=x[t];
	}
	s=s*(100-p)/m;
	printf("%d\n",s);
	}
	return 0;
}