#include<stdio.h>
int main(){
    double paymentAmount,accountbalance;
    int isActive;
    if(scanf("%1f %1f %d",&paymentAmount, &accoutBalance,&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 (paymentAmount > accountbalance){
        printf("Insufficient Balance\n");
        return 0;
    }
    double remainingBalance = accountBalance - paymentAmount;
    printf("%.2f\n",remainingBalance);
    return 0;
}