#include<stdio.h>
int main()
{
    float paymentAmount, accountBalance, isActive;
    if (scanf("%f %f %f", &paymentAmount ,&accountBalance, &isActive) != 3) {
        printf("Invalid intput\n");
        return 0;
    }
    if (isactive == 0){
        printf("Account Inactive\n");
    }
    else if(paymentAmount > accountBalence){
        printf("Insufficient Balance\n");
    }
    else {
        float remaining = (float)(accountBalance - paymentAmount);
        printf("%.2f\n",remaining);
    }
    return 0;
}