#include<stdio.h>
int main() {
    int paymentAmount;
    int accountBalance;
    int isActive;
    scanf("%d",&paymentAmount);
    scanf("%d",&accountBalance);
    scanf("%d",&isActive);
    if(paymentAmount<0||accountBalance<0||isActive<0) {
        printf("Invalid input");
    }
    else if(paymentAmount==0||accountBalance==0||isActive==0) {
        printf("Account Inactive");
    }
    else if(accountBalance<paymentAmpunt) {
        printf("Insufficient Balance");
    }
    else {
        float remaining;
        remaining = accountBalance-paymentAmount;
        printf("%.2f",remaining);
    }
    return 0;
}