// editor2
#include<stdio.h>
int main()
{
    int paymentAmount,accountBalance,isActive;
    float remaining balance;
    scanf("%d",&paymentAmount);
    scanf("\n%d",&accountBalance);
    scanf("%d",&isActive);
    remaining balance=accountBalance-paymentAmount;
    if(remaining balance<0)
    {
        printf("\nInsufficient Balance");
    }
    else if(isActive==0)
    {
        printf("\nAccount Inactive");
    }
    else if(paymentAmount<0 || accountBalance<0 || isActive<0)
    {
        printf("\nInvalid input");
    }
    else
    {
        printf("\n%.2f",remaining balance);
    }
    
    
    return 0;
}