// editor2
#include<stdio.h>
int main()
{
   float paymentAmount;
   float accountBalance;
   int isActive;
   if(scanf("%f %f %d",&paymentAmount,&accountBalance,&isActive)!=3);
   {
   printf("Invalid input");
   return 0;
}
   if(accountBalance<paymentAmount)
   {
       printf("Insufficient Balance");
       return 0;

   
   if(isActive == 0)
   {
       printf("Account Inactive");
       return 0;
   }
   
   if(paymentAmount<0 || paymentAmount>1000000 || accountBalance<0,accountBalance>1000000 || (isActive!=0 && isActive !=1))
   {
    printf("Invalid input");
    return 0;   
   }
   float remainingBalance = accountBalance - paymentAmount;
   printf("%.2f",remainingBalance);
   return 0;
}