#include<stdio.h>
int main(){
    float paymentamount,accountbalance;
    int isactive;
    if(scanf("%f",&paymentamount) !=1 ||
    scanf("%f",&accountbalance) !=1||
    scanf("%d",&isActive) !=1){
        printf("Invalid input");
        return 0;
    }
    if(isactive != 0 && isactive != 1) {
        printf("Invalid input ");
        return 0;
    }
    if(isactive ==0) {
        printf("Account Inactive");
        return 0;
    }
    if(paymentamount > accountbalance){
        printf("Insufficient Balance");
        return 0;
    }
    float remaining = accountbalance - paymentamount;
    printf("%.2f",remaining);
    return 0;
}