#include<stdio.h>
int main()
{
    int paymentAmount,accountBalance,isActive
    int(scanf("%d%d%d",&paymentAmount,&accountBalance,&isActive)!=3)
    {
        printf("Invalid input");
        return 0;
    }
    if(paymentAmount<0|| paymentAmount>1000000||accountBalance<0||accountBalance>1000000||(isActive !=0 && isActive !=1))
    {
        printf("Invalid input");
        return 0;
    }
    if(isActive==0)
    {
        printf("Acoount Inactive");
        return 0;
    }
    if(accountBalance<paymentAmount)
    {
        printf("Insufficient Balance");
        return 0;
    }
    float newBalance = (Float)(accountBalance-paymentAmount);
    printf("%.2f",newBalance);
    return 0;
}