#include<stdio.h>
int main()
{
    int a,b,c;
    if(scanf("%d %d %d",&a,&b,&c))
    {
        printf("Invalid input\n");
    }
    else if(c==0)
    {
        printf("Account Inactive");
    }
    else if(b>=a)
    {
        float d=b-a;
        printf("%0.2f\n",d);
    }
    else
    {
        printf("Insufficient Balance\n");
    }
    }
    else
    {
        printf("Invalid input\n");
    }
    return 0;
}