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