#include<stdio.h>
void processpayment(int paymentAmount, int accountBalance, int isActive)
{
    if(isActive == 0)
    printf("Account Inactive");
    else if (paymentAmount > accountBalance)
        printf("Insufficient Balance\n");
    else
    
        printf("%0.2f\n",accountBalance - paymentAmount);
}
int main()
{
    int paymentAmount,accountBalance,isActive;
    if(scanf("%d %d %d",&paymentAmount,&accountBalance,&isActive)!=3){
        printf("Invalid Input\n");
    }else{
        processpayment(paymentAmount,accountBalance,isActive);
    }
    return 0;
}