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