#include<stdio.h>
int main()
{
    int paymentAmount,accountBalance,isActive;
    float a;
    scanf("%d",&paymentAmount);
    scanf("%d",&accountBalance);
    scanf("%d",&isActive);
    if(accountBalance>1000000||paymentAmount<=1||accountBalance<=1||accountBalance>1000000)
    {
        printf("Invalid input");
    }
    elseif(paymentAmount>accountBalance)
    {
        printf("Insufficient Balance");
    }
    else if(isActive==0)
    {
        printf("Account Inactive");
    }
    else
    {
        a=accountBalance-paymentAmount;
        printf("%.2f",a);
    }
    return 0;
}