// editor2
#include<stdio.h>
#include<ctype.h>
int main()
{
    int p,b,a;
    if(scanf("%d",&p)!=1||
    scanf("%d",&b)!=1||
    scanf("%d",&a)!=1)
    {
        printf("Invalid input");
        return 0;
    }
    if(a! =0 && a!=1")
    {
        printf("Invalid input");
    }
    else if (a==0){
        printf("Account Inactive");
    }
    else if(b<p){
        printf("Insufficient Balance");
    }else{
        float rem=b-p;
        printf("%.2f",rem);
    }
    return 0;
}