#include<stdio.h>
int main()
{
    float paymentAmount;
    float accountBalance;
    int isActive;
    float a;
    scanf("%f",&paymentAmount);
    scanf("%f",&accountBalance);
    scanf("%d",&isActive);
    if(isActive==0){
        printf("Account Inactive\n");
    }
    else if(paymentAmount>accountBalance){
        printf("Insufficient Balance\n");
    }
    else if(isActive==1){
             if(paymentAmount<accountBalance){
             a=accountBalance-paymentAmount;
             printf("%0.2f\n",a);
               }
        }
    else if(scanf("%c",&isActive))
             printf("Invalid input");
        }
        return 0;
}