#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");
    }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;
}