#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(paymentAmount<0||accountBalance<0||isActive)
        
            printf("Invalid Input");
        }
    }
    return 0;
}