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