// editor2
#include<stdio.h>
int main()
{
    int a,b,c;
    if(scanf("%d %d %d",&a &b &c)!=3){
        printf("Invalid input\n");
    }
    else if(!c)
    {
        printf("Account Inactive\n");
    }
    else if(b>a)
    {
        printf("Insufficient Balance\n");
    }
    else
    {
        printf("%.2f\n",(float)(b-a));
    }
}