// editor2
#include<stdio.h>
int main()
{
    int paymentAmount,accountBalance;
    if(scanf("%d %d %d",&paymentAmount,&accountBalance,&isActive)!=3)
    {
        printf("Invalid input\n");
        return 0;
    }
    if(paymentAmount<0||(isActive!=0&&isActive!=1))
    {
        printf("Invalid input\n");
    }
    else if(isActive==0)
    {
        printf("Account Inactive\n");
    } 
    else if(paymentAmount>accountBalance)
    {
        printf("Insufficient Balance\n");
    }
    else
    {
        float remaining=accountBalance-paymentAmount;
        printf("%.2f\n",remaining);
    }
    return 0;
}