#include <stdio.h>
int main() 
{
    int pa;
    int ab;
    int isa;
    if (scanf("%d\n",&pa)!=1||scanf("%d\n",&ab)!=1||scanf("%d\n",&isa)1=1)
    {
        printf("Invalid input\n");
        return 0;
    }
    if (pa<0||pa>1000000||ab<0||ab>1000000||(isa!=0&&isa!=1))
    {
         printf("Invalid input\n");
         return 0;
    }
     if (isa==0)
     {
         printf("Account Inactive\n");
         return 0;
    }
    if(ab<pa)
    {
        printf("Insufficient Balance\n");
        return 0;
    }
    double rb=ab-pa;
    printf("%.2f\n",rb);
    return 0;
}