#include<stdio.h>
int main()
{
    int pa;
    int ab;
    int i5a;
    if(scanf("%d",&pa)!=1||
    scanf("%d",&ab)!=1||
    scanf("%d",&i5a)!=1)
    {
        printf("Invalid input\n");
        return 0;
        
    }
    if(pa<0||pa>1000000||ab<0||ab>1000000||(i5a!=0&&i5a!=1))
    {
        printf("Invalid input\n");
        return 0;
    }
    if(i5a==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;
     
    }