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