// edito
#include<stdio.h>
int main()
{
    int paymentAmount,accountBalance,isactive;
    float a;
    scanf("%d",&paymentAmount);
    scanf("%d",&acountBalance);
    scanf("%d",&isActive);
    
    if(paymentAmount<=1||paymentAnount>1000000||accountBalance<=1||accountBalance>=1000000)
    {
        printf("Iinvalid input");
        
    }
    else if(accountBalance<paymentAmount){
        printf("Insfficient Balance");
    }
    else if(isActive==0)
    {
        printf("Account Inactive");
    }
    else{
        a=acountBalance-paymentamount;
        printf("%.2f",a);
    }
    
    
    
}