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