#include<stdio.h>
int main()
{
    int a,b,c;
    if(scanf("%d %d %d",&a,&b,&c)!=3)
    {
        printf("Invalid Input");
        return 0;
    }
    if(a<0 || a>1000000 || b<0 || b>1000000 || (c!=0&&c!=1))
    {
        printf("Invalid Input");
        return 0;
    }
    if(c==0)
    {
        printf("Account Inactive\n");
        return 0;
    }
    if(a>b)
    {
        printf("Insufficient Balance");
        return 0;
    }
    float Remaining Balance=b-a;
    printf("%.2f\n",Remaining Balance);
return 0;
}