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