#include<stdio.h>
void main()
{
    float pa,ab,remaining;
    int active;
    scanf("%f%f%d",&pa,&ab,&remaining);
    scanf("%d",&active);
    if(active==0)
    {
        printf("Account Inactive\n");
    }
    else if(ab<pa)
    {
        printf("Insufficient Balance\n");
    }
    else
    {
        remaining=ab-pa;
        printf("%.2f",remaining);
    }
}