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