#include<stdio.h>
int main(){
    int pa,ab,ia;
    scanf("%d%d%d",&pa,&ab,&ia);
    if(!=3)
    printf("Invalid input");
    else if(!ia)
    printf("Account Inactive");
    else if(pa>ab)
    printf("Insufficient Balance");
    else
    printf("%.2f",(float)(ab-pa));
    return 0;
}