#include<stdio.h>
int main(){
    int paymentamount,accountbalance,isactive;
    float r;
    scanf("%d",&paymentamount);
    scanf("%d",&accountbalance);
    scanf("%d",&isactive);
    if(paymentamount<=0||accountbalance<=0||isactive<0||isactive>1)
    {
        printf("Invaild Input");
    }
    else if(is active==0)
    {
        printf("Account Inactive");
    }
    else if(paymentamount>accountbalance)
    {
        printf("Insufficient Balance");
    }
    else
    {
        r=accountbalance-paymentamount;
        printf("%.2f",r);
    }
}