// editor2
#include<stdio.h>
int main(){
    int paymentAmount,accountbalance,isActive;
    if(scanf("%d",&paymentAmount) !=1 || 
    scanf("%d",&accountBalance) !=1 ||
    scanf("%d",&isActive) !=1) {
      printf("Invalid input");
      return 0;
    }
    if(isActive==0) {
        printf("Account inActive");
    }
    else if(paymentAmount>accountBalance) {
        printf("Insufficient Balance");
    }
    else {
        float remainingBalance = accountBalance - paymentAmount;
        printf("%.2f",remainingBalance); 
        
    }
    return 0;
}