#include<stdio.h>
int main(){
    double paymentAmount,accountBalance;
    int isactive;
    if(scanf("%lf %lf %d",&paymentAmount,&accountBalance,isActive)!=3){
        printf("Invalid input\n");
        return 0;
    }
    if(paymentAmount<0||paymentAmount>1000000||accountBalance>1000000||(isactive!=0&&isActive!=1)){
        printf("Invalid input\n");
        return 0;
    }
    if(isActive==0){
        printf("Account Inactive\n");
        return 0;
    }
    if(paymentAccount>accountBalance){
        printf("Insufficient Balance\n");
        return 0;
    }
    double remainingbalace=accountBalance-paymentAccount;
    printf("%.2f\n",remainingBalance);
    return 0;
}