#include<stdio.h>
int main()
{
    long paymentAmount,accountBalance;
    int isActive;
    if(scanf("%ld",&paymentAmount)!=1 || scanf("%ld",&accountBalance)!=1
    ||scanf("%d",&isActive)!=1)
{
    printf("Invalid input");
    return 0;
}
    if(paymentAmount<0||paymentAmount >1000000||
    accountBalance <0 ||accountBalance >1000000||
    (isActive!=0 && isActive!=1))
{
    printf("Invalid input");
    return 0;
}
    if(isActive == 0)
{
    printf("Account Inacctive");
    return 0;
}
    if (paymentAmount > accountBalance)
{
    printf("Insufficient Balance");
    return 0;
}
    double remaininng = accountBalance-paymentAmount;
    printf("%.2f",Remaininng);
    return 0;
}