#include<stdio.h>
int main()
{
    int paymentAmount, accountBalance, isActive;
    if (scanf("%d",&paymentAmount)!=1||
    (scanf("%d",&accountBalance)!=||
    scanf("%d",&isActive)!=1)
    {
        printf("Invalid input");
        return 0;
    }
    if(isActive!=1 && isActive!=0)
    {
        printf("Invalid input");
        return 0;
    }
    if(isActive==0)
    {
        printf("Account Inactive");
        return 0;
    }
    if (paymentAmount>accountBalance)
    {
        printf("Insufficient Balance");
        return 0;
    }
    float remainingBalance=accountBalance-paymentAmount;
    printf("%0.2f",remainingBalance);
    return 0;
}