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