#include<stdio.h>
int main()
{
    int pay,bal,active;
    if scanf("%d",&pay)!=1 ||
    scanf("%d",&bal)!=1 ||
    scanf("%d",&active)!=1) {
        printf("Invalid input");
        return 0;
    } 
    if(pay < 0 || bla <0 || (active !=0 && active !=1)){
        printf("Invalid input");
    } else if (active == 0){
    printf("Account Inactive");
    } else if (pay > bal) {
        printf("Insufficient Balance");
    } else {
        float result=bal - pay;
        printf("%.2f",result);
    }
    return 0;
}