#include<stdio.h>
int main() {
   int paymentAmount, accountBalance,isActive;
   if(scanf("%d %d %d", &paymentAmount,&accountBalance, &isActive) != 3) {
       printf("Invalid input");
       return 0;
   }
   if (isActive !=0 && isActive !=1) {
       printf("Invalid input");
       return 0;
   if(isActive !=0 && isActive != 1) {
       printf("Invalid input");
       return 0;
   }
   if (isActive ==0) {
       printf("Account Inactive");
       return 0;
   }
   if (paymentAmount > accountBalance) {
       printf("Insufficient Balace");
       return 0;
   }
   float remainder = accountBalance - paymentAmount;
   printf("%.2f", remainder);
   return 0;
   
 }