#include<stdio.h>
int main()
{
    int paymentAmount,accountBalance,isActive;
    if(scanf("%d%d%d",&paymentAmount,&accountBalance,&isActive)!=3)
    {
        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)
    {
        printf("Account Inactive")
        return 0;
        
    }
    if(paymentAmount>accountBalance)
    {
      printf("Insufficient Balance");
    }
    else
    {
        float(remainingBalance=accountBalance-paymentAmount);
        printf("%.2",remainingBalance);
    }
    return 0;
}